Cooper?
Debunked:
Not to be taken seriously. The first thing I noticed was a schoolboy blunder in celestial mechanics: you don’t add velocities in the way that he did, you add energies, that’s to say the squares of the velocities. If an asteroid with an asymptotic approach speed of 5.6 km/s is going to hit Earth its impact speed (prior to air resistance) would be 12.5…
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