[Alter Kaker]

The asteroid tracking programs (LINEAR, NEAT, etc.) are all small and under-funded. Again, if you're seriously worried about the thread of a collision, you should think about tackling that problem before you start planning to evacuate 6 billion people to Mars.

As for space-based observation, I think orbit makes a heck of a lot more sense than a telescope on the moon. Do you know how insanely complicated it would be to land a large lens on the moon intact?

[ASH71]

As i stated to you but perhaps you just ignored it, I would rather have the searchers in space. The more we leave the better we will be at it. So when the Sh!t hits the fan we can do something and not detroy it as you suggested. Who would send anyone to Mars let alond 6 Bil people. Because you see there is no life support on Mars and under your plans never would be would there?

[Fitzcarraldo]

Even Earth-based telescopes, with new adaptive optic technology at high-altitude sites are exceeding capabilities once thought only possible from a lunar observatory or orbit.