|DTE||Strike||Premium||Intrinsic Value||Time Value|
|Person||10 days||20 days||30 days||40 days||50 days||100 days||120 days|
|Can we really detect any asteroids in space with accuracy and do we have any real means of destroying it?||Yes, we can detect new asteroids when they are still in space. Every night dozens of new asteroids are found, including a few that can come close to the Earth.|
|Regarding the second part of the question, the goal would be to deflect them more than destroy them, and it is technologically possible. The Hera/DART mission currently being developed by ESA and NASA will demonstrate exactly this capability.|
|I always wanted to ask: what is worse for life on Earth - to be hit by a single coalesced asteroid chunk, or to be hit by a multiple smaller pieces of exploded asteroid, aka disrupted rubble pile scenario?||DVK: This is difficult to answer. If the rubble is small (centimetres to meters) it is better to have lots of small ones – they’d create nice bright meteors. If the rubble pieces are tens of meters it doesn’t help.|
|Let’s say that hypothetically, an asteroid the size of Rhode Island is coming at us, it will be a direct hit - you’ve had the resources and funding you need, your plan is fully in place, everything you’ve wanted you got. The asteroid will hit in 10 years, what do you do?||DVK: I had to look up how big Rhode Island is – a bit larger than the German Bundesland ‘Saarland’. Ok – this would correspond to an object about 60 km in diameter, right? That’s quite big – we would need a lot of rocket launches, this would be extremely difficult. I would pray. The good news is that we are quite convinced that we know all objects larger than just a few kilometers which come close to our planet. None of them is on a collision course, so we are safe.|
|the below is a reply to the above|
|Why are you quite convinced that you know all object of that size? And what is your approach in finding new celestial bodies?||DVK: There was a scientific study done over a few years (published in Icarus 2018, search for Granvik) where they modelled how many objects there are out there. They compared this to the observations we have with the telescopic surveys. This gives us the expected numbers shown here on our infographic: https://www.esa.int/ESA_Multimedia/Images/2018/06/Asteroid_danger_explained|
|There are additional studies to estimate the ‘completeness’ – and we think that we know everything above roughly a few km in size.|
|To find new objects, we use survey telescopes that scan the night sky every night. The two major ones are Catalina and Pan-STARRS, funded by NASA. ESA is developing the so-called Flyeye telescope to add to this effort https://www.esa.int/ESA_Multimedia/Images/2017/02/Flyeye_telescope.|
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|Thanks for the answer, that's really interesting! It's also funny that the fist Flyeye deployed is in Sicily, at less than 100km from me, I really had no idea||DVK: Indeed, that's cool. Maybe you can go and visit it one day.|
|the below is a reply to the original answer|
|What about Interstellar objects however, like Oumuamua?||DVK: The two that we have seen - 'Oumuamua and comet Borisov - were much smaller than the Saarland (or Rhode Island ;-) - not sure about Borisov, but 'Oumuamua was a few hundred meters in size. So while they could indeed come as a complete surprise, they are so rare that I wouldn't worry.|
|Would the public be informed if an impending asteroid event were to happen? And, how would the extinction play out? Bunch of people crushed to death, knocked off our orbit, dust clouds forever?||DVK: We do not keep things secret – all our info is at the web page http://neo.ssa.esa.int. The ‘risky’ objects are in the ‘risk page’. We also put info on really close approaches there. It would also be very difficult to keep things ‘under cover’ – there are many high-quality amateur astronomers out there that would notice.|
|In 2029 asteroid Apophis will fly really close to Earth, even closer than geostationary satellites. Can we use some of those satellites to observe the asteroid? Is it possible to launch very cheap cube sats to flyby Apophis in 2029?||DVK: Yes an Apophis mission during the flyby in 2029 would be really nice. We even had a special session on that topic at the last Planetary Defense Conference in 2019, and indeed CubeSats were mentioned. This would be a nice university project – get me a close-up of the asteroid with the Earth in the background!|
|the below is a reply to the above|
|So you’re saying it was discussed and shelved?||In the conference we just presented ideas. To make them happen needs funding - in the case of ESA the support of our member countries. But having something presented at a conference is the first step. One of the results of the conference was a statement to space agencies to consider embarking on such a mission. See here: https://www.cosmos.esa.int/documents/336356/336472/PDC_2019_Summary_Report_FINAL_FINAL.pdf/341b9451-0ce8-f338-5d68-714a0aada29b?t=1569333739470|
|Go to the section 'resolutions'. This is now a statement that scientists can use to present to their funding agencies, demonstrating that it's not just their own idea.|
|Thanks for doing this AMA! Did we know the Chelyabinsk meteor in 2013 (the one which had some great videos on social media) was coming? Ig not, how comes? Also, as a little side one, have there been any fatalities from impact events in the past 20 years?||Unfortunately, the Chelyabinsk object was not seen in advance, because it came from the direction of the Sun where ground-based telescopes cannot look.|
|No known fatalities from impacts have happened in the past 20 years, although the Chelyabinsk event did cause many injuries, fortunately mostly minor.|
|the below is a reply to the above|
|How often do impacts from that direction happen, compared to impacts from visible trajectories?||In terms of fraction of the sky, the area that cannot be easily scanned from the ground is roughly a circle with a radius of 40°-50° around the current position of the Sun, corresponding to ~15% of the total sky. However, there is a slight enhancement of objects coming from that direction, therefore the fraction of objects that may be missed when heading towards us is a bit higher.|
|However, this applies only when detecting an asteroid in its "final plunge" towards the Earth. Larger asteroids can be spotted many orbits earlier, when they are farther away and visible in the night side of the sky. Their orbits can then be determined and their possible impacts predicted even years or decades in advance.|
|There must be a trade-off when targeting asteroids as they get closer to Earth, is there a rule of thumb at what the best time is to reach them, in terms of launch time versus time to reach the asteroid and then distance from Earth?||DVK: Take e.g. a ‘kinetic impactor’ mission, like what DART and Hera are testing. Since we only change the velocity of the asteroid slightly, we need to hit the object early enough so that the object has time to move away from it’s collision course. Finding out when it is possible to launch requires simulations done by our mission analysis team. They take the strength of the launcher into account, also the available fuel for course corrections, and other things. Normally each asteroid has its own best scenario.|
|Do you also look at protecting the moon from asteroids? Would an impact of a large enough scale potentially have major impacts on the earth?||DVK: There are programmes that monitor the Moon and look for flashes from impacting small asteroids (or meteoroids) - https://neliota.astro.noa.g or the Spanish MIDAS project. We use the data to improve our knowledge about these objects. These programmes just look at what is happening now.|
|For now we would not do anything if we predicted a lunar impact. I guess this will change once we have a lunar base in place.|
|Why aren't there an international organisation comprised of countries focused on the asteroid defence? Imagine like the organisation with multi-billion $ budget and program of action on funding new telescopes, asteroid exploration mission, plans for detection of potentially dangerous NEA, protocols on action after the detection - all international, with heads of states discussing these problems?||DVK: There are international entities in place, mandated by the UN: The International Asteroid Warning Network (http://www.iawn.net) and the Space Mission Planning Advisory Group (http://www.smpag.net). These groups advise the United Nations. That is exactly where we come up with plans and protocols on action. But: They don’t have budget – that needs to come from elsewhere. I am expecting that if we have a real threat, we would get the budget. Right now, we don’t have a multi-billion budget.|
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|There is no actual risk of any sizable asteroids hitting earth in the foreseeable future. Any preparation for it would just be a waste of money.||DVK: Indeed, as mentioned earlier, we do not expect a large object to hit is in the near future. We are mainly worried about those in the size range of 20 m to 40 m, which happen on average every few tens of years to hundreds of years. And where we only know a percent of them or even less.|
|President Obama wanted to send a crewed spacecraft to an asteroid - in your opinion is this something that should still be done in the future, would there be any usefulness in having a human being walk/float on an asteroid's surface?||DVK: It would definitely be cool. I would maybe even volunteer to go. Our current missions to asteroids are all robotic, the main reason is that it is much cheaper (but still expensive) to get the same science. But humans will expand further into space, I am sure. If we want to test human exploration activities, doing this at an asteroid would be easier than landing on a planet.|
|this is another reply||Yes, but I am slightly biased by the fact that I work at the European astronaut centre ;) There exist many similarities to what we currently do for EVA (extra vehicular activities) operations on the International Space Station versus how we would 'float' around an asteroid. Slightly biased again, but using such a mission to test exploration technologies would definitely still have value. Thanks Obama! - AC|
|I've heard that some asteroids contains large amounts of iron. Is there a possibility that we might have "space mines" in the far away future, if our own supply if iron runs out?||Yes, this is a topic in the field known as space mining, part of what we call Space Resources. In fact, learning how we can process material we might find on asteroids or other planetary bodies is increasingly important, as it opens up the opportunities for sustainable exploration and commercialization. Its a technology we need to master, and asteroids can be a great target for testing how we can create space mines :) - AC|
|By how much is DART expected to deflect Didymos? Do we have any indication of the largest size of an asteroid we could potentially deflect?||PM: Didymos is a binary asteroid, consisting of a main asteroid Didymos A (~700m) and a smaller asteroid Didymos B (~150m) orbiting around A with a ~12 hours period. DART is expected to impact Didymos B and change its orbital period w.r.t. Didymos A of ~1%. (8 mins)|
|The size of Didymos B is the most representative of a potential threat to Earth (the highest combination of probability and consequence of impacts), meaning smaller asteroids hit the Earth more often but have less severe consequences, larger asteroids can have catastrophic consequences but their probability of hitting the earth is very very low.|
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|Why is there less probability of larger asteroids hitting earth?||DVK: There are less large objects out there. The smaller they are, the more there are.|
|the below is a reply to the original answer|
|Is there any chance that your experiment will backfire and send the asteroid towards earth?||PM: Not at all, or we would not do that :) Actually Dimorphos (the Didymos "moon") will not even leave its orbit around Didymos. It will just slightly change its speed.|
|I'm sure you've been asked this many times but how realistic is the plot of Armageddon? How likely is it that our fate as a species will rely on (either) Bruce Willis / deep sea oil drillers?||Taking into consideration that Bruce Willis is now 65 and by the time HERA is launched he will be 69, I do not think that we can rely on him this time (although I liked the movie).|
|HERA will investigate what method we could use to deflect asteroid and maybe the results will show that we indeed need to call the deep sea oil drillers.|
|the below is a reply to the above|
|So then would it be easier to train oil drillers to become astronauts, or to train astronauts to be oil drillers?||I do not know which one would be easier since I have no training/experience of deep see oil drilling nor becoming an astronaut, but as long as the ones that would go to asteroid have the sufficient skills and training (even Bruce Willis), I would be happy.|
|If budget was no object, which asteroid would you most like to send a mission to?||Nice question! For me, I'd be looking at an asteroid we know something about, since I would be interested in using it for testing how we could extract resources from it. So for me, I would choose Itokawa (https://en.wikipedia.org/wiki/25143_Itokawa), which was visited by Hayabusa spacecraft. So we already have some solid prospecting carried out for this 'roid! - AC|
|this is another reply||Not sure if it counts as an asteroid, but Detlef and myself would probably choose ʻOumuamua, the first discovered interstellar object.|
|the below is a reply to the above|
|Do we even have the capability to catch up to something like that screaming through our solar system? That thing has to have a heck of a velocity to just barrel almost straight through like that.||DVK: Correct, that would be a real challenge. We are preparing for a mission called 'Comet Interceptor' that is meant to fly to an interstellar object or at least a fresh comet - but it will not catch up with it, it will only perform a short flyby.|
|After proving to be able to land on one, could an asteroid serve as a viable means to transport goods and or humans throughout the solar system when the orbit of said asteroid proves beneficial. While it is probably quite problematic to land the payload, it could save fuel or am I mistaken?||Neat idea! Wonder if anyone has done the maths on the amount of fuel you would need/save vs certain targets. - AC|
|PM: To further complement, the saving is quite marginal indeed because in order to land (softly) on the asteroid you actually need to get into the very same orbit of that asteroid . At that point your orbit remains the same whether you are on the asteroid or not..|
|can the current anti-ballistic missiles systems intercept a terminal phase earth strike asteroid? or it is better to know beforehand and launch an impacting vehicle into space?||DVK: While I do see presentations on nuclear explosions to deflect asteroids at our professional meetings, I have not seen anybody yet studying how we could use existing missile systems. So it's hard to judge whether existing missiles would do the job. But in general, it is better to know as early as possible about a possible impact and deflect it as early as possible. This will minimize the needed effort.|
|How much are we prepared against asteroid impacts at this moment?||DVK: 42… :-) Seriously – I am not sure how to quantify ‘preparedness’. We have international working groups in place, mentioned earlier (search for IAWN, SMPAG). We have a Planetary Defence Office at ESA, a Planetary Defense Office at NASA (who spots the difference?), search the sky for asteroids, build space missions… Still we could be doing more. More telescopes to find the object, a space-based telescope to discover those that come from the direction of the Sun. Different test missions would be useful, … So there is always more we could do.|
|Have you got any data on the NEO coverage? Is there estimations on the percentage of NEOs we have detected and are tracking? How can we improve the coverage? How many times have asteroids been able to enter earths atmosphere without being detected beforehand?||Here’s our recently updated infographics with the fraction of undiscovered NEOs for each size range: https://www.esa.int/ESA_Multimedia/Images/2018/06/Asteroid_danger_explained|
|As expected, we are now nearly complete for the large ones, while many of the smaller ones are still unknown.|
|In order to improve coverage, we need both to continue the current approach, centered on ground-based telescopes, and probably also launch dedicated telescopes to space, to look at the fraction of the sky that cannot be easily observed from the ground (e.g., towards the Sun).|
|Regarding the last part of your question, small asteroids enter the Earth atmosphere very often (the infographics above gives you some numbers), while larger ones are much rarer.|
|In the recent past, the largest one to enter our atmosphere was about 20 meters in diameter, and it caused the Chelyabinsk event in 2013. It could not be detected in advance because it came from the direction of the Sun.|
|We have however detected a few small ones before impact. The first happened in 2008, when a ~4-meter asteroid was found to be on a collision course less than a day before impact, it was predicted to fall in Northern Sudan, and then actually observed falling precisely where (and when) expected.|
|this is another reply||>After|
|DVK: And to add what MM said - Check out http://neo.ssa.esa.int. There is a ‘discovery statistics’ section which provides some of the info you asked about. NASA is providing similar information here https://cneos.jpl.nasa.gov/stats/. To see the sky which is currently covered by the survey telescopes, you need to service of the Minor Planet Center which we all work together with: http://www.minorplanetcenter.org, ‘observers’, ‘sky coverage’. That is a tool we use to plan where we look with our telescopes, so it is a more technical page.|
|Are there any automatic systems for checking large numbers of asteroids orbits, to see if the asteroid's orbit is coming dangerously close to Earth, or is it done by people individually for every asteroid? I ask it because LSST Rubin is coming online soon and you know it will discover a lot of new asteroids.||Yes, such systems exist, and monitor all known and newly discovered asteroids in order to predict possible future impacts.|
|The end result of the process is what we call "risk list": http://neo.ssa.esa.int/risk-page|
|It is automatically updated every day once new observational data is processed.|
|What are your favourite sci-fi series?||DVK: My favorites are ‘The Expanse’, I also liked watching ‘Salvation’. For the first one I even got my family to give me a new subscription to a known internet streaming service so that I can see the latest episodes. I also loved ‘The Jetsons’ and ‘The Flintstones’ as a kid. Not sure the last one counts as sci-fi though. My long-time favorite was ‘Dark Star’.|
|this is another reply||Big fan of The Expanse at the moment. Nice, hard sci-fi that has a good impression of being grounded in reality - AC|
|this is another reply||When I was a kid I liked The Jetsons, when growing up Star Trek, Star wars and I also used to watch with my sister the 'V'.|
|When determining the potential threat of a NEA, is the mass of an object a bigger factor or size? I'm asking because I'm curious if a small but massive object (say, with the density of Psyche) could survive atmospheric entry better than a comparatively larger but less massive object.||The mass is indeed what really matters, since it’s directly related with the impact energy.|
|And as you said composition also matters, a metal object would survive atmospheric entry better, not just because it’s heavier, but also because of its internal strength.|
|What are your thoughts on asteroid mining as portrayed in sci-fi movies? Is it feasible? If so would governments or private space programs be the first to do so?What type of minerals can be found on asteroids that would merit the costs of extraction?||Certainly there is valuable stuff you can find on asteroids. For example, the likely easiest material you can harvest from an asteroid would be volatiles such as H2O. Then you have industrial metals, things like Iron, Nickel, and Platinum group metals. Going further, you can break apart many of the oxide minerals you would find to get oxygen (getting you closer to producing rocket fuel in-situ!). Its feasible, but still needs alot of testing both here on Earth and eventually needs to be tested on a target. It may be that governments, via agencies like ESA or NASA, may do it first, to prove the principles somewhat, but I know many commercial entities are also aggresively working towards space mining. To show you that its definitely possible, I'd like to plug the work of colleagues who have processed lunar regolith (which is similar to what you may find on asteroids) to extract both oxygen and metals. Check it out here: http://www.esa.int/ESA_Multimedia/Images/2019/10/Oxygen_and_metal_from_lunar_regolith|
|Will 2020's climax be a really big rock?||DVK: Let's hope not...|
|Considering NASA, ESA, IAU etc. is working hard to track Earth-grazing asteroids, how come the Chelyabinsk object that airburst over Russia in 2013 came as a total surprise?||The Chelyabinsk object came from the direction of the Sun, where unfortunately ground-based telescopes cannot look at. Therefore, it would not have been possible to discover it in advance with current telescopes. Dedicated space telescopes are needed to detect objects coming from this direction in advance.|
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|Is this to say that it was within specific solid angles for the entire time that we could have observed it given its size and speed?||Yes, precisely that. We got unlucky in this case.|
|Have any of you read Lucifer's Hammer by Larry Niven? In your opinion, how realistic is his depiction of an asteroid strike on Earth?||DVK: I have – but really long ago, so I don’t remember the details. But I do remember that I really liked the book, and I remember I always wanted to have a Hot Fudge Sundae when reading it.|
|I was thinking about the asteroid threat as a teen and came up with this ideas (Hint: they are not equally serious, the level of craziness goes up real quick). Could you please comment on their feasibility? 1. Attaching a rocket engine to an asteroid to make it gradually change trajectory, do that long in advance and it will miss Earth by thousands of km 2. Transporting acid onto asteroid (which are mainly metal), attaching a dome-shaped reaction chamber to it, using heat and pressure to then carry out the chemical reaction to disintegrate asteroids 3. This one is even more terrible than a previous one and totally Dan Brown inspired — transporting antimatter on asteroid, impacting and causing annihilation. Thank you for this AMA and your time!||DVK: Well the first one is not so crazy, I have seen it presented... the difficulty is that all asteroids are rotating in one way or another. So if you continuously fire the engine it would not really help. You'd need to switch the engine on and off. Very complex. And landing on an asteroid is challenging too. Just using the 'kinetic impactor' which we will test with DART/Hera (described elsewhere in this chat) is simpler. Another seriously proposed concept is to put a spacecraft next to an asteroid and use an ion engine (like we have on our Mercury mission BepiColombo) to 'push' the asteroid away.|
|As for 2 and 3 I think I will not live to see that happening ;-)|
|What is the process to determine the orbit of a newly discovered asteroid?||The process is mathematically quite complex, but here's a short summary.|
|Everything starts with observations, in particular with measurements of the position of an asteroid in the sky, what we call "astrometry". Discovery telescopes extract this information from their discovery images, and make it available to everybody.|
|These datapoints are then used to calculate possible trajectories ("orbits") that pass through them. At first, with very few points, many orbits will be possible.|
|Using these orbits we can extrapolate where the asteroid will be located during the following nights, use a telescope to observe that part of the sky, and locate the object again.|
|From these new observations we can extract new "astrometry", add it to the orbit determination, and see that now only some of the possible orbits will be compatible with the new data. As a result, we now know the trajectory better than before, because a few of the possible orbits are not confirmed by the new data.|
|The cycle can then continue, with new predictions, new observations, and a more accurate determination of the object's orbit, until it can be determined with an extremely high level of accuracy.|
|What are some asteroids that are on your "watchlist"?||We have exactly that list on our web portal: http://neo.ssa.esa.int/risk-page|
|It's called "risk list", and it includes all known asteroids for which we cannot exclude a possible impact over the next century. It is updated every day to include newly discovered asteroids, and remove those that have been excluded as possible impactors thanks to new observations.|
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|That's quite a list!! Do you guys ever feel stressed or afraid when you have to add another dangerous candidate (and by dangerous I mean those above 200m) is added to this Risk List?||Yes, when new dangerous ones are added it's important that we immediately do our best to gather more data on them, observing them with telescopes in order to get the information we need to improve our knowledge of their orbit.|
|And then the satisfaction of getting the data needed to remove one from the list is even greater!|
|What inspired you to go into this field of study?||I was fascinated by astronomy in general since I was a kid, but the actual "trigger" that sparked my interest in NEOs was a wonderful summer course on asteroids organized by a local amateur astronomers association. I immediately decided that I would do my best to turn this passion into my job, and I'm so happy to have been able to make that dream come true.|
|this is another reply||DVK: I started observing meteors when I was 14, just by going outside and looking at the night sky. Since then, small bodies in the solar system were always my passion.|
|As a layperson, I still think using nuclear weapons against asteroids is the coolest method despite better methods generally being available. Do you still consider the nuclear option the cool option, or has your expertise in the field combined with the real-life impracticalities made it into a laughable/silly/cliche option?||DVK: We indeed still study the nuclear option. There are legal aspects though, the ‘outer space treaty’ forbids nuclear explosions in space. But for a large object or one we discover very late it could be useful. That’s why we have to focus on discovering all the objects out there as early as possible – then we have time enough to use more conventional deflection methods, like the kinetic impactor (the DART/Hera scenario).|
|It seems like doing this well would require international cooperation, particularly with Russia. Have you ever reached out to Russia in your work? Do you have a counterpart organization there that has a similar mission?||DVK: Indeed international cooperation is important - asteroids don't know about our borders! We work with a Russian team to perform follow-up observations of recently discovered NEOs. Russia is also involved in the UN-endorsed working groups that we have, IAWN and SMPAG (explained in another answer).|
|how much can experts tell from a video of a fireball or meteor? Can you work out what it's made of and where it came from? https://www.reddit.com/space/comments/hdf3xe/footage_of_a_meteor_at_barrow_island_australia/?utm_source=share&utm_medium=web2x||If multiple videos or pictures, taken from different locations, are available, then it's possible to reconstruct the trajectory, and extrapolate where the object came from.|
|Regarding the composition, it's a bit more difficult if nothing survives to the ground, but some information can be obtained indirectly from the fireball's color, or its fragmentation behavior. If a spectral analysis of the light can be made, it's then possible to infer the chemical composition in much greater detail.|
|I've always wanted to know what the best meteorite buying site is and what their average price is??||DVK: Serious dealers will be registered with the 'International Meteorite Collectors Association (IMCA)' - https://www.imca.cc/. They should provide a 'certificate of authenticity' where it says that they are member there. If you are in doubt, you can contact the association and check. Normally there are rough prices for different meteorite types per gram. Rare meteorites will of course be much more expensive than more common ones. Check the IMCA web page to find a dealer close to you.|
|Just read through Aidans link to the basaltic rock being used as a printing material for lunar habitation. There is a company called Roxul that does stone woven insulation that may be able to shed some light on the research they have done to minimize their similarity to asbestos as potentially carcinogenic materials deemed safe for use in commercial and residential applications. As the interior surfaces will essentially be 3D printed lunar regolith what are the current plans to coat or dampen the affinity for the structure to essentially be death traps for respiratory illness?||At least initially, many of these 3d printed regolith structures would not be facing into pressurised sections, but would rather be elements placed outside and around our pressure vessels. Such structures would be things like radiation shields, landing pads or roadways, etc. In the future, if we move towards forming hermetically sealed structures, then your point is a good one. Looking into terrestrial solutions to this problem would be a great start! - AC|
|What kind of career path does it take to work in the asteroid hunting field?||It's probably different for each of us, but here's a short summary of my own path.|
|I became interested in asteroids, and near-Earth objects in particular, thanks to a wonderful summer course organized by a local amateur astronomers association. Amateur astronomers play a great role in introducing people, and young kids in particular, to these topics.|
|Then I took physics as my undergrad degree (in Italy), followed by a Ph.D. in astronomy in the US (Hawaii in particular, a great place for astronomers thanks to the exceptional telescopes hosted there).|
|After finishing the Ph.D. I started my current job at ESA's NEO Coordination Centre, which allowed me to realize my dream of working in this field.|
|this is another reply||DVK: Almost all of us have a Master's degree either in aerospace engineering, mathematics, physics/astronomy/planetary science, or computer science. Some of us - as MM - have a Ph.D. too. But that's not really a requirement. This is true for our team at ESA, but also for other teams in other countries.|
|What is the likelihood of an asteroid hitting the Earth In the next 200 years?||It depends on the size, large ones are rare, while small ones are much more common. You can check this infographics to get the numbers for each size class: https://www.esa.int/ESA_Multimedia/Images/2018/06/Asteroid_danger_explained|
|Have you played the Earth Defence Force games and if you have, which one is your favourite?||No I have not played the Earth Defence Force games, but I just looked it up and I think I would liked it. Which one would you recommend?|
|How close is too close to earth? Space is a SUPER vast void so is 1,000,000 miles close, 10,000,000? And if an asteroid is big enough can it throw earth off its orbit?||DVK: Too close for my taste is when we compute an impact probability > 0 for the object. That means the flyby distance is zero :-) Those are the objects on our risk page http://neo.ssa.esa.int/risk-page.|
|If an object can alter the orbit of another one, we would call it planet. So unless we have a rogue planet coming from another solar system (verrry unlikely) we are safe from that.|
|How can I join you when I'm older?||DVK: Somebody was asking about our career paths... Study aerospace engineering or math or physics or computer science, get a Masters. Possibly a Ph.D. Then apply for my position when I retire. Check here for how to apply at ESA: https://www.esa.int/About_Us/Careers_at_ESA/Frequently_asked_questions2#HR1|
|How much is too much?||DVK: 42 again|
|Are you aware of any asteroids that are theoretically within our reach, or will be within our reach at some point, that are carrying a large quantity of shungite? If you're not aware, shungite is like a 2 billion year old like, rock stone that protects against frequencies and unwanted frequencies that may be traveling in the air. I bought a whole bunch of the stuff. Put them around the la casa. Little pyramids, stuff like that.||DVK: If I remember my geology properly, Shungite forms in water sedimental deposits. This requires liquid water, i.e. a larger planet. So I don't think there is a high chance to see that on asteroids.|
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Hello everyone, thank you for your continued interest and support. In the past two weeks, various tasks of TokenClub have been progressing steadily. The product development and community operation progress this week are as follows:
1. TokenClub Events
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In order to better understand the live broadcast of TokenClub by overseas communities, we translated the live broadcast content into English and uploaded it to TokenClub’s Medium official account, so that the community’s small partners can view it.
4)Preview: TokenClub’s self-media grandma is invited to participate in the golden financial theme live event
From May 29th to June 4th, Golden Finance will hold a five-day live broadcast of the theme of “Finding Double Coins”. Grandpa Coin will express his views on June 3, welcome to pay attention.
Recently, Binance Co-founder He Yi, TRON founder Sun Yuchen, Hobbit HBTC founder Ju Jianhua, OSL chairman Dave, BlockVC founding partner Xu Yingkai, Outlier Ventures founder amie Burke, Bitribe founder SKY, CryptoBriefing CEO Han Kao , Huarai Group / Vice President, Global Market and Business Leader Ciara, Guosheng Securities Blockchain Research Institute Sun Shuang, Tongtongtong Research Institute CEO Song Shuangjie, Jin Tiancheng Law Firm Senior Partner Yu Bingguang, Binance China Jiang Jinze, principal researcher of Blockchain Research Institute, Meng Yan, vice president of Digital Asset Research Institute, co-founder of Primitive Ventures & director of Coindesk advisory board-Dovey Wan, founding partner of Genesis Capital & co-founder of Kushen Wallet Ocean Liao Yangyang, Binance C2C-Kathy, Binance OTC-Coco, Binance Contract & Options-Justin, Binance VIP-Jennifer, Binance Broker-Jess, Binance Mining Pool-Denny, Harbin Institute of Technology Blockchain Research Executive Deputy Director Xu Zhifeng, dForce founder Yang Mindao, Mars Finance co-founder Shang Silin, Cobo & Yuchi co-founder Shenyu, well-known investor Xu Zhe, CasperLabs CEO Mrinal Manohar, CasperLabs co-founder Scott Walker, Chairman of Rock Tree Omer Ozden, Nova Club incubation team leader & Waterdrop Capital partner Zheng Yushan, Rolling Stone miner founder Alex Lam, BitUniverse coin founder Chen Yong, Odaily Planet Daily founder and CEO Mandy Wang Mengdie, Binance stablecoin BUSD project responsible Helen Tu and senior expert of TokenClub blockchain and cryptocurrency investment strategy-Zao Shen talks with you about blockchain things ~
On May 18, Block 101 Binance Key Account Manager Luna talked to Primitive Ventures co-founder, non-profit bitcoin development fund Hardcore Fund executive director, and Coindesk advisory board director-Dovey Wan, to understand “C and C How is the Goddess of Crypto Assets made? “Dovey Wan shared with us on asset allocation, investment judgment, entrepreneurship, DCEP, etc.
On May 19, Block 101 Yingge talked with Sun Zeyu, the founding partner of Genesis Capital and co-founder of Kushen Wallet, to share the theme of “Blockchain Investment Experience”. This investor, who is rated as “reliable” by insiders, recommends that novices try not to touch contracts, do not stay overnight even when making contracts, be alert to risks, refuse gambling, and rationally analyze investments.
On May 20th, 499Block ’s two-year birthday carnival “Global Hot Chain, Keeping Together for Every Year” celebration was held in the TokenClub Live Room. The cross-border AMA Solitaire + popular day group anchor live video sharing, including Binance Co-founder He Yi, TRON founder Sun Yuchen, Hobbit HBTC founder Ju Jianhua, OSL chairman Dave, BlockVC founding partner Xu Yingkai, Outlier Ventures founder amie Burke, Bitribe founder SKY, CryptoBriefing CEO Han Kao, Huobi Group / Vice President Global Markets and Dozens of blockchain leaders from home and abroad, such as Ciara, the business leader, all appeared on the scene, and 499Block became a popular beauty angel group to help the interactive host.
On May 20, Sun Shuang, senior researcher of Guosheng Securities Blockchain Research Institute, Song Shuangjie, Jin Tong, CEO of Tongzhengtong Research Institute were jointly invited by Lingang Xinyefang, Lingang Innovation Management School, and Binance China Blockchain Research Institute. Tian Bingguang Senior Partner Yu Bingguang, Binance China Blockchain Research Institute Chief Researcher Jiang Jinze, Vice President of Digital Assets Research Institute Meng Yan, and many experts talked about the “Critical Digital RMB DCEP” in the live broadcast, one A feast of intertwined thoughts is worth watching again!
On May 21st, Ocean Liao Yangyang, the founder of Block 101 Seven Seven Dialogue Force Field, focused on the “big enlightenment era of digital assets”, Ocean shared with us his entrepreneurial experience, the first pot of gold, public chain, currency circle and Analysis of the current market. Regarding the future of Bitcoin, Ocean feels that he can work hard towards the direction of digital gold and become a substitute or supplement for gold. He is determined to see more, because the ceiling of the entire industry is very high, and he still cannot see its end point. The index level is rising, far from being over.
On May 22, “In the name of the Pizza Festival, we came to a different live broadcast” Bringing Goods “”, which was organized by the girls in the 101-day group of the block: June 6, July 7, Sisi, Yingge, Qianjiangyue , Dialogue: Binance First Sister, Binance C2C-Kathy, Binance OTC-Coco, Binance Contract & Options-Justin, Binance VIP-Jennifer, Binance Broker-Jess, Binance Mining Pool-Denny. We have explained to us one by one about C2C, OTC, contract options, etc. If you are interested, please move to the live room.
On May 22, Block 101 Sisi Dialogue Xu Zhifeng, executive deputy director of the Blockchain Research Center of Harbin Institute of Technology, shared the theme: “Strategy of Great Powers: Seizing New Highlands of Blockchain Technology”. He expressed his views on his own currency circle experience, entrepreneurship, blockchain technology, DECP, etc. Xu Zhifeng is very optimistic about the future development of blockchain. He said: “Ten years later, blockchain will become a very common industry. We are the Internet industry and have never changed.”
On May 23, the old Chinese doctor Zao Shen from the coin circle went online ~ The theme of this issue: If you want to be short, you must be able to sing first, and if you want to be long, you must be patient. If the meal is not fragrant, the game is not good, and the happiness of the past has drifted into the distance, just because the daily reading is still a loss, and the head is hurt. Don’t panic, the old Chinese doctor Zao Shen of the currency circle will adopt the Trinity Interventional Therapy and precise care to regenerate life. Don’t move quickly to the live room to see what “therapy” is.
On May 25, Block 101, July 7th conversation with dForce founder Yang Mindao, talked about “DeFi opportunities and challenges.” Yang Mindao believes that the four biggest benefits of DeFi are: programmability; non-custodial nature; non-licensing; composability. He believes that the current public chain market is seriously homogenized, and the most promising public chain is Ethereum. Ethereum is the best and largest in terms of developer group, ecology, and technological evolution, and can absorb the advantages of each public chain. At the same time, he is also extremely optimistic about DeFi, “DeFi application value is gradually verified, and the value of this type of token will gradually become more prominent.”
On May 26th, Mars Finance co-founder Shang Silin Hardcore Dialogue Cobo & Yuchi co-founder Shenyu and well-known investor Xu Zhe. The trend of “financialization” in the digital asset industry is becoming more and more obvious, and the friends of miners need to master more and more skills. Unveiling the mystery of hedging for everyone.
On May 26th, Nova Superstar Dialogue Phase 13 focused on the Silicon Valley star project CasperLabs, specially invited CasperLabs CEO Mrinal Manohar, CasperLabs co-founder Scott Walker, Rock Tree chairman Omer Ozden, and Nova Club incubation team leader Water Capital Partners Zheng Yushan, discuss CasperLbs together.
On May 26, Block 101 Sisi talked with the founder of the Rolling Stone Miner, Alex Lam, and took us into the “post-worker life” of a PhD in finance. Alex shared the reasons for entering the coin circle, the first pot of gold, mining, pitted pits, investment experience and opportunities in the digital currency industry. Alex said: Bitcoin exceeds US $ 100,000, and it will be in the second half of next year or the year after.
On May 27th, Block 101 Yingge talked with BitUniverse founder Chen Yong and shared the theme: “Who” needs grid trading. Chen Yong mainly introduced the currency trading tool of Bitcoin. In his view, grid trading has changed an investor’s concept-from stud into a batch of positions and positions. Regarding the price of Bitcoin, Chen Yong believes that the price of Bitcoin may reach one hundred thousand dollars around 2030.
On May 28, Block 101 Binance Mining Pool Wu Di talked to Mandai Wang Mengdie, founder of Planet Daily Odaily, to learn more about the process of “media entrepreneurs marching into the blockchain from venture capital circles”. Mandy believes that the core competence in the media industry is high-quality original content, which is the most basic but difficult to stick to. The initial focus of entering the mixed media industry of the dragon and dragon is to focus and amplify value.
On May 29th, Block 101 Qianjiangyue Dialogue Hellen Tu, the project leader of Binance Stablecoin BUSD project, talked with everyone about the stablecoin “Life and Death”, Hellen shared the stablecoin in detail, and published his own the opinion of. For details, please move to the live room.
On May 30th, Zaoshen came to share the theme: Dongfeng blowing, bullets flying, unlimited chase? In this issue, Zao Shen shared with you the recent international financial situation and various major events in the United States in the past week, which extended to the impact on the currency circle and answered various questions about investment strategies. Friends who want to know more details can move to the live room of Zao Shen.
3.TokenClub operation data
-Live data: 13 live broadcasts in the past two weeks, with over 800,000 views. TokenClub hosted a total of 870 live broadcasts with a total of 45.06 million views.
-Binary trade data: In the past two weeks, guess the rise and fall to participate in a total of 1268 times, the amount of participation exceeded 2 million TCT. At present, it is guessed that the rise and fall function has participated in a total of 1.11 million times, with a cumulative participation amount of 498 million TCT.
-Chat data: In the past two weeks, a total of 19271 messages have been generated. A total of 4.85 milliom messages have been launched since the function was launched.
-Mini-game data: The mini-game has participated in a total of 4212 times in the past two weeks. A total of 1,66 million self-functions have been online.
-Cut leeks game data together: Since the game was launched, the total number of user participation in the game was 962612 TCT total consumption was 6,27 million gift certificate total consumption was 15,95million and TCT mining output was 161496.
-TokenClub KOL data: Over the past two weeks, the total reading volume of the BTCGrandpa article has been viewed by more than 300,000 people.
-Social media data: At present, the number of Weibo official accounts is 18033 and the number of Twitter followers is 1332 and we have opened the official Medium account this week, welcome to follow.
-Telegram official group data: In the past 2 weeks, there were 238 chats in the group, and the total number of Telegram official groups is currently 2906.
-Medium data: Medium official account u/TokenClub has published 5 excellent articles, official announcements and updates are published in English, welcome to follow.
TokenClub held an event for forwarding Twitter and telegram group chats for overseas users. Bitcoin halved in less than two weeks, overseas users are more active in the telegram group, and some friends are more concerned about Binance Block 101 live broadcast, aggregation exchange, TCT usage and other issues, the administrator responded in time.On May 12th, when Bitcoin was halved, TokenClub organized a forwarding Twitter, telegram group chat prize event and participating in a live question asking interactive prize event for overseas users. There are many live broadcast events in the near future. The live broadcast poster information will be released to overseas users as soon as possible. The follow-up TokenClub will translate and broadcast high-quality live broadcast content to Twitter and Medium. Bitcoin halved, overseas users are more active in the telegram group, and some partners are more concerned about block 101 live broadcast, bitcoin future price trend, TCT usage and other issues, the administrator responded in time in the group.
Sweet Orange Club Weekly News
Last Friday, a holiday, the community opened the red envelope rain event, and brought a sincere gift to everyone while relaxing in the holiday. At the same time, it also sent the most sincere blessings to all mothers in the community on Mother’s Day. Thank you for your long-term support and help to the Orange Club community.
Hundred-day scheduled investment event (Phase II)
The fourth week of the second 100-day fixed investment plan held this week has been awarded, and everyone is still very active in this event. This week, the Bitcoin halving market was also opened in advance. The small partners participating in the fixed investment should now have a certain floating win, so we adopt the correct cycle investment strategy to believe that it can bring unexpected benefits to everyone.
Sign in the lottery.
On the evening of May 3rd and May 10th, TCT Fortune Free Academy carried out the 51st and 52nd week sign-in sweepstakes, and rewarded the small TCT partners who had always insisted on signing in. In these two sign-in sweepstakes, the lucky friends received 20–180TCT as a reward. In addition, during the lucky draw, the college friends also actively expressed their opinions on the topic of this year’s bull market.
The Leek Paradise Community Conference will continue as usual every Sunday at 20:00. During the conference, members will discuss recent hot topics, including gifts and blessings for Mother ’s Day, and the halving of Bitcoin everyone is paying attention to. At the end, the friends in the group also showed a rare enthusiasm at the first sight. It seems that the market still affects the mood. The members routinely started a red envelope rain to cheer for the participating partners and encourage everyone to maintain patience and confidence. Of course, at the same time, we are encouraging ourselves to see the community meeting next week. Come on!
TokenClub volunteer community, sign in red envelopes every day, as long as you sign in every day, you can get good benefits, friends join us quickly! In the past two weeks, the community has conducted active partners.
Volunteer community: Change to the currency circle consultation and pass the analysis of Grandma Coin and Panda analysts, support TokenClub in action, and continue to vote for TCT. In the last month, we have worked hard to learn the rain god’s strategy. We have doubled the coins in our hands. The community WeChat group has recently injected fresh students. We look forward to more people joining! Volunteer community, will continue to work hard for TokenClub
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TokenClub website: www.tokenclub.com