Planetary astronomer, studying piles of rock in space. Reader of books. Drinker of tea. He/him. This is a personal account. To bigotry no sanction.
Planetary astronomer, studying piles of rock in space. Reader of books. Drinker of tea. He/him. This is a personal account. To bigotry no sanction.
This is a reminder that the K-Pg mass extinction was precipitated by the impact of a carbonaceous chondrite asteroid; not a comet.
And perturbations to the Oort Cloud do not create showers of comets.
Today in things I thought had been adequately explained back in the 1990s...