On 17 July 2018, an ancient lump from space thwacked into the Moon with enough energy to produce a brilliant flash of light. With another space rock seemingly in pursuit, a second flash lit up a different region of the Moon almost exactly 24 hours later (see GIF).
Current estimates suggest these two impacting ‘meteoroids’ — fragments of asteroids and comets — were both about the size of a walnut. They likely originated from the Alpha Capricornids meteor shower — itself the result of Earth and the Moon passing through the dusty tail of comet 169P/NEAT.
Definitely take a minute to watch the gif of the two impacts. It’s always cool to see video of events like this.