The moon is probably not Earth’s only natural satellite right now. Our planet's gravity regularly captures small space rocks and pulls them into orbit. Astronomers estimate that there's probably a 1-yard-wide “minimoon” orbiting Earth at any given time.
And now, a team of researchers in Australia think they actually spotted one burning up in Earth’s atmosphere in 2016 as a particularly bright meteor, or fireball. It's only the second fireball that scientists suspect came from a minimoon. The team presented their findings in a recent paper published in The Astronomical Journal.
