Imagine you’re an astronomer who discovered an asteroid. Happy days, you might be able to name it after yourself (99942 O’Neill has a certain ring to it, don’t you think?). At first you feel little concern, after all, we are getting better at spotting near-Earth objects. But when you get news from another observatory that they had been tracking the same object weeks earlier, your interest is piqued. On the one hand, you didn’t technically discover it, but you did confirm its existence. Unfortunately this is probably the one observation you really didn’t want to make. It turns out that this chunk of rock is heading in our direction. And unlike the Earth-grazers that have come before, this asteroid isn’t going to drift past our planet, it isn’t even going to skip off our atmosphere, it’s going to hit us.
Now imagine you are the president of a nation determined to stop the asteroid from hitting Earth. What do you do? Naturally you’d call your team of oil drillers scientific advisors to present your options. One space scientist suggests sending a rocket to the asteroid, strapping it on in the hope it might be nudged out of harms way. The astronomer who made the discovery of the killer asteroid is having a nervous break down in the corner of the room. Your military advisor is urging you to attach a nuclear warhead to your most powerful rocket, in an attempt to obliterate the target. The Secretary of State is calling for restraint; we need to collaborate with other nations, blasting nuclear missiles in to space would violate all kinds of international treaties, wars have been started for less, perhaps someone else has a better idea…?
Although I doubt we’ll ever be fully prepared to act swiftly and decisively in the event of discovering a civilization-ending asteroid, we can at least try. Defending the planet against the ever-present threat of impact is one of the most critical abilities we must develop as a race, ensuring the long-term future of our species. Fortunately, a team of scientists, engineers, policy makers and lawyers (lawyers?) are teaming up to confront this problem…
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