To put things in perspective: we are also in danger of being hit by a meteor which could end life on Earth. Certainly such astronomical events do happen, and the fallout of such an event would devastating.
But there is uncertainty as to whether we will get hit because of the difficulties in tracking celestial objects.
Oh, we'll get hit again. That's an absolute 100% certain thing.
Actually, the planet takes hits every day but they usually burn up in the atmosphere (which is part of the planet) and are seen as "shooting stars." Some even make it to earth as small meteorites. Meteor Crater in Arizona is the result of a 50 meter nickel-iron asteroid striking the earth.
If you're ever in LA, make it a point to visit Griffith Observatory, go the information desk downstairs and ask to see "germy." It's a meteorite that you can hold in your hands.
I'm sure you know about
Apophis? In 2029, this asteroid will pass very, very close to the earth. It will pass by closer than our communication satellites. Now, if it passes through a very small, I believe 600m wide "keyhole," it WILL strike the earth in 2036.
So how much are we willing to sacrifice to prevent this outcome?
Considering the survival of our entire
species could be in play, the resources of the entire planet must come into play.
I don't think that the answer is nothing. Better telescopes for tracking and the like are a good investment.
Absolutely, more and better telescopes are needed because the further out an object is, the better chance we have to change its trajectory so we don't arrive at the same place at the same time. The answer would NOT be to blow the object up rather you want to deflect it. The further out, the smaller amount of deflection (thus less resources and energy) is necessary to accomplish this goal.
But what if the solution was to handicap our economy in some way (i.e. by constructing an expensive orbital laser)? Then the answer is not so obvious.
So, slight comfort while waiting for the annihilation of homo sapiens or fighting like hell as a species for survival.
I'd rather not lie down and die, thank you very much!
I am a bit of a geek when it comes to astronomy and cosmology, so sorry if I geeked out too much here.
