Random Tusks

Linked?: Andrew Cooper on Feb 15 Asteroid and Russian Meteor

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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Charles Appleton Day

2021 Tall el-Hammam study makes final Jeopardy! question