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Joris _

Space capsule probed for asteroid dust : Nature News - 1 views

  • They have clearly shown us the path forward to the inevitable large-scale exploration of the near-Earth asteroid population
  • Interest in asteroid missions has also been on the rise in the United States. In June, US President Barack Obama called for a manned trip to an asteroid. And late last year, the OSIRIS-REx project, also a sample-return mission targeting a carbon-rich asteroid, was selected as a finalist in NASA's New Frontiers Program,
Joris _

Making space exploration pay with asteroid mining - 1 views

  • Asteroids happen to be particularly rich in platinum group metals
  • a motive for space travel beyond "the pursuit of knowledge"
  • So to those despairing about the recent cutting of space budgets across the world, invest your savings in asteroid mining
johannessimon81

Asteroid mining could lead to self-sustaining space stations - VIDEO!!! - 5 views

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    Let's all start up some crazy space companies together: harvest hydrogen on Jupiter, trap black holes as unlimited energy supplies, use high temperatures close to the sun to bake bread! Apparently it is really easy to do just about anything and Deep Space Industries is really good at it. Plus: in their video they show Mars One concepts while referring to ESA and NASA.
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    I really wonder what they wanna mine out there? Is there such a high demand on... rocks?! And do they really think they can collect fuel somewhere?
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    Well they want to avoid having to send resources into space and rather make it all in space. The first mission is just to find possible asteroids worth mining and bring some asteroid rocks to Earth for analysis. In 2020 they want to start mining for precious metals (e.g. nickel), water and such.They also want to put up a 3D printer in space so that it would extract, separate and/or fuse asteroidal resources together and then print the needed structures already in space. And even though on earth it's just rocks, in space a tonne of them has an estimated value of 1 million dollars (as opposed to 4000 USD on Earth). Although I like the idea, I would put DSI in the same basket as those Mars One nutters 'cause it's not gonna happen.
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    I will get excited once they demonstrate they can put a random rock into their machine and out comes a bicycle (then the obvious next step is a space station).
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    hmm aside from the technological feasibility, their approach still should be taken as an example, and deserve a little support. By tackling such difficult problems, they will devise innovative stuffs. Plus, even if this doom-to-fail endeavour may still seem you useless, it creates jobs and make people think... it is already a positive! Final word: how is that different from what Planetary Resources plan to do? It is founded by a bunch of so-called "nuts" ... (http://www.planetaryresources.com/team/) ! a little thought: "We must never be afraid to go too far, for success lies just beyond" - Proust
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    I don't think that this proposal is very different from the one by Planetary Resources. My scepticism is rooted in the fact that - at least to my knowledge - fully autonomous mining technology has not even been demonstrated on Earth. I am sure that their proposition is in principle (technically) feasible but at the same time I do not believe that a privately funded company will find enough people to finance a multi-billion dollar R&D project that may or may not lead to an economically sensible outcome, i.e. generate profit (not income - you have to pay back the R&D cost first) within the next 25 years. And on that timescale anything can happen - for all we know we will all be slaves to the singularity by the time they start mining. I do think that people who tackle difficult problems deserve support - and lots of it. It seems however that up till now they have only tackled making a promotional video... About job creation (sorry for the sarcasm): if usefulness is not so important my proposal would be to give shovels to two people - person A digs a hole and person B fills up the same hole at the same time. The good thing about this is that you can increase the number of jobs created simply by handing out more shovels.
Joris _

NASA will miss Congressional deadline for asteroid tracking - Science Fair - USATODAY.com - 0 views

  • he panel finds the 2005 order to find 90% of Earth-threatening asteroids 460 feet or larger infeasible,
  • No method for diverting asteroids has been experimentally demonstrated
  • Options include a "gravity tractor" orbiting slow-moving objects and tugging them off course with tidal tugs, a "kinetic" impact of a heavy spacecraft into an asteroid, or a nuclear explosion
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  • Unlike the dinosaurs, we are smart enough to do the math and figure out the answer that modest resources should be dedicated to the problem
    • Joris _
       
      "we are smart enough" is a completely subjective comment. Reading the article it does not give the same impression :|
LeopoldS

In Asteroid's Aftermath, a Sigh of Relief - NYTimes.com - 0 views

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    nice story, especially on the idea of using the lenin statue and lamp post shadows to determine the trajectory of the asteroid
LeopoldS

Meteorite Crashes In Russia, Panic Spreads (Updating) - 5 views

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    Latest update: the European Space Agency says their experts "confirm there is no link between the meteor incidents in Russia and asteroid 2012DA14 flyby tonight". How did they find this? As they did not see this one coming, how could they come to that conclusion that early!
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    As you can see from the videos of this meteorite it is coming in from an east to south-east direction (i.e. the direction of the sunrise, more or less). 2012DA14 is coming from due south as you can see here: http://www.wired.com/wiredscience/2013/02/how-to-watch-asteroid-2012-da14/ So the two objects seem to be coming from different directions - at least that would be my explanation.
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    My point is, that if you want to come to such a conclusion (that it is not rubble) you need to be able to construct back the orbits of both objects. 2012DA14 has been observed for one year only, but it is well enough. When the meteor has been observed for the first time, such that we knew its orbit? has it been observed before? if yes, why the impact has not been predicted?
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    If you can show that they come from different directions you know that they are not associated, even if you don't reconstruct their orbits.
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    I don't think so. If both objects were part of the same, they would be on different but intersecting orbits anyway, hence different directions. Anyway, I am not knowledgeable in atmospheric entry ... But, with so few information about the object, I am surprised they are 100% certain it is not related to DA14. I think science requires more cautions ... With only the direction they are 100% sure, while the probability of such event is itself extremely small, I am amazed... They can't even predict with 100% certainty where a space debris will fall... plus, nobody consider the object being part of a bigger one that broke up during early entry (which has not been observed) ... so many uncertainties and possible hypothesis... and i am not the only one :) http://www.infowars.com/russian-meteor-linked-to-da14-asteroid/
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    was not that evident to me also but apparently with the right understanding it was quite clear; was amazed also how quickly NASA has published the likely trajectory of the russian object - have a look at it: quite evident that these are not coming from the same body
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    yes, now i get my 100% certainty with the reconstructed orbits nothing else (http://wiki.nasa.gov/cm/blog/Watch%20the%20Skies/posts/post_1361037562855.html) ... I still think that esa anouncemement was highly premature but with a high probability of being right...
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    Some more results on the topic (link to an arxiv article inside): http://www.bbc.co.uk/news/science-environment-21579422
Lionel Jacques

Laser-wielding satellite swarm to deflect asteroids - 2 views

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    "The latest idea comes from engineers at Glasgow's University of Strathclyde who suggest that a swarm of laser-wielding satellites could nudge Earth-bound asteroids off their collision course.... One proposed deflection technique involves using lasers to pulverize the surface of the asteroid, ejecting tiny bits of rock that would act as a propellant and push it onto a different course."
santecarloni

Rydberg atom simulates Trojan asteroids - physicsworld.com - 3 views

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    The atom may not be a planetary system, but under specific circumstances it can behave like one. That is the curious finding of physicists in Austria and the US, who have confirmed a 1994 prediction that, in the presence of an applied electromagnetic field, electrons in very highly energized atomic states should behave like the Trojan asteroids of Jupiter.
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    Bohr's model finally not so wrong?
Luís F. Simões

Timelapse video of asteroid discoveries in our solar system from 1980-2010 (watch in 10... - 5 views

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    Nice... Now I have a lame question: after you have discovered ~500k asteroids, all moving (I assume more or less) chaotically in that asteroid belt, how do you tell one from another?
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    hmm, not very chaotic indeed - laws of Kepler plus some perturbations.
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    That's what I thought but when presented as a green "goo" in the video, it appears rather unordered... so I guess this is just an impression evoked by a not-to-scale presentation?
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    It depends... orbits can be chaotic if the orbital period is in a resonance with Jupiter, although such orbits are not stable. Such configurations tend to get disrupted pretty quickly (in cosmic terms :P) http://en.wikipedia.org/wiki/Kirkwood_gap
Joris _

NASA's next destination: a near-Earth asteroid? | National | Chron.com - Houston Chronicle - 0 views

  • At a workshop last month in Washington, D.C., NASA canvassed the scientific, human spaceflight and planetary defense communities about their priorities for a mission to a near-Earth asteroid.
  • an asteroid mission is possible as early as 2019 using a pair of enhanced Orion spacecraft with a two-person crew.
  • November 2019 and spend three months flying more than 7 million miles to an asteroid that's about 33 feet across.
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  • he crew would "park" their vehicle nearby and spacewalk over
  • After about five days the crew would climb back into one of the capsules and spend three months flying home.
Francesco Biscani

Asteroid blast reveals holes in Earth's defences - space - 26 October 2009 - New Scientist - 2 views

  • On 8 October an asteroid detonated high in the atmosphere above South Sulawesi, Indonesia, releasing about as much energy as 50,000 tons of TNT, according to a NASA estimate released on Friday. That's about three times more powerful than the atomic bomb that levelled Hiroshima, making it one of the largest asteroid explosions ever observed.
aborgg

Nuclear cycler: An incremental approach to the deflection of asteroids - 1 views

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    This paper introduces a novel deflection approach based on nuclear explosions: the nuclear cycler. The idea is to combine the effectiveness of nuclear explosions with the controllability and redundancy offered by slow push methods within an incremental deflection strategy. The paper will present an extended model for single nuclear stand-off explosions in the proximity of elongated ellipsoidal asteroids, and a family of natural formation orbits that allows the spacecraft to deploy multiple bombs while being shielded by the asteroid during the detonation.
LeopoldS

Billionaires and Polymaths Expected To Unveil a Plan To Mine Asteroids - Slashdot - 1 views

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    From slashdot
Aurelie Heritier

Why NASA Should Nab an Asteroid - 2 views

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    In his last dispatch from the recent AIAA Global Space Exploration Conference, veteran astronaut and PM contributor Tom Jones argues for NASA to undertake a mission to snare a nearby small asteroid and tow it into the orbit of the moon.
johannessimon81

Asteroid break-up captured on film for the first time - 1 views

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    Probably related to the former ACT study on asteroid spin-up and the YORP effect.
Daniel Hennes

NASA's Asteroid Grand Challenge Series - 1 views

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    NASA's new crowdsourcing initiative to find asteroid threats.
Juxi Leitner

Asteroid Response System in Place (Complete With U.S. Military Eye Patch) - 1 views

  • However, the US air force, which funded the development of the telescope, requires that software automatically black out a swathe of pixels to hide the trajectories of passing satellites.
Joris _

25,000 new asteroids found by NASA's sky mapping - Yahoo! News - 0 views

  • WISE is discovering near-Earth asteroids that are on average larger than what's found by existing telescopes, which should help scientists better calculate their potential threat
andreiaries

BBC News - Hayabusa capsule particles may be from asteroid - 3 views

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    "Researchers hope the minute particles are from the asteroid"
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