this post was submitted on 11 Jun 2024
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Wouldn't me be able to predict that sort of collision decades or centuries in advance? I feel like we know the trajectories of all the moon-sized objects in the solar system pretty accurately by this point.
If it's that big I think we've got a pretty good chance of seeing it coming. But at any given time we're only looking at a fraction of the sky.
True, but aren't there telescopes like WISE (and the upcoming NEO Surveyor) whose whole purpose is to continually and repeatedly scan the sky for objects? It seems rather unlikely that we would have repeatedly missed a moon-sized object.