Comment The one good feature of ARM (Score 4, Interesting) 108
NASA's vaunted "Asteroid Redirect Mission" is now widely regarded as crap. It doesn't give us any new knowledge, it's not a good intermediate step for human colonization of space, and it's been mismanaged so badly that you could tell me it had been infiltrated by Russians intent on destroying America, and I wouldn't much doubt it.
But it does have one saving grace: it's our best shot if we ever find an asteroid headed for Earth impact.
I found this out sort of by accident - I was playing Kerbal Space Program, which has a NASA-sponsored module for doing asteroid redirects. I had a ship designed for that in orbit, and was looking for a good target.
I found one. On a direct intercept course. About a week out.
To make things worse, it was at like 80 degrees inclination. To cut a very long story short, I managed to redirect it to aerobrake, then stabilized the orbit so it wouldn't eventually deorbit.
Now, I fully realize that was a game, and that rocket science is actually a lot more complex than strapping a shitload of boosters to everything (my standard design). But the basic principle remains - something that can redirect an asteroid to enter lunar orbit is also something that can redirect an asteroid off of an impact course.
I don't know if that fully justifies the program - it's an absurd expense for what we get. On the other hand, what price can we put on avoiding extinction?