The phrase "comet crash" refers to the collision or impact of a comet, which is a space object made of ice, dust, and rock, with another celestial body like a planet or a moon. Full definition
I love comet crash, one of my favorite games. (metacritic.com)
Astronomer Heidi Hammel, she says, has «seen comets crash into Jupiter, the Great Dark Spot on Neptune, and close - ups of the moons of Mars,» and planetary geologist Adriana Ocampo «went to work for NASA when she was a teenager, which is way more interesting than, like, babysitting or bagging groceries.» (discovermagazine.com)
Two years ago, astronomers Lisa Randall and Matthew Reece of Harvard University fingered dark matter for a 35 million - year cycle — which they later revised to 32 million years — based on the birth dates of large craters from comet crashes. (discovermagazine.com)