Welcome to SciShow Space News.
I’m Caitlin Hofmeister, your host on our first voyage together.
So tell me how this sounds to you.
We build a robot, huck it into space, use it to grab a thousand ton asteroid and park
it in orbit around the Moon so astronauts can walk around on it, because I think that
sounds awesome.
And that’s exactly what NASA’s planning to do.
Since 1998, NASA’s Near Earth Object Observation Program has been searching local space for
comets and asteroids that might kill us.
So far it’s identified over 10,000 nearby asteroids, and now NASA scientists are ramping
up their plan to use that data to take rock collection to a whole new level.
A few days ago, NASA invited tech companies everywhere to help build the technology they’ll
need for their new asteroid retrieval mission.
Asteroids have the potential to be a mindboggling source of raw materials.
A space rock just 500 meters across could contain more precious metals than humanities
entire known reserve.
One large asteroid between Mars and Jupiter named 16 Psyche is thought to hold 17 million
billion tons of nickel and iron, enough to satisfy demand on Earth for millions of years.
Plus, asteroids contain water which could be used as a source of fuel for rockets en
route to Mars.
So harvesting asteroids could probably be a crucial component of any serious attempt
at colonizing Mars.
The problem is that all that stuff is out there in space.
Meanwhile, asteroids and Earth have a long history together and it’s full of drama.
So, the first step in harnessing all the goodness from these rocks is to bring one home for
us to study.
In 2017 or 18, NASA plans to launch the first asteroid redirect vehicle which basically
looks like a 50-kilowatt solar-power array attached to a really giant sack.
Using solar power, it'll fly out to whichever asteroid NASA picks, taking about two years
to get there, and when it arrives at the rock it'll just bag it.
Then it'll pull the asteroid out of its orbit so that it spirals in towards us just in time
to get pulled into the lunar orbit by the Moon’s gravity, a whole process that’ll
take another 2-5 years.
After that, the vehicle will park the asteroid in what scientists call a distant retrograde
orbit, some 70,000 kilometers above the surface of the Moon.
And then it’s just a 25 day trip for a crew of two to fly out there and see what’s up.
NASA predicts that astronauts will be visiting our adopted asteroid by 2025 to inspect it,
collect samples and eventually dismantle it.
It’ll be our closest look ever at the structure and composition of an asteroid.
So there you have it.
Space factories and Martian colonies might be a long way off, but we’re developing
the technology we’ll need to make them happen right now.
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