If you were hoping to see the “mini moon,” you’ve probably been disappointed. But experts say the asteroid was an important milestone in planetary defense research.

A new mini-moon the size of a city bus will begin circling our planet and hanging out in our skies until Thanksgiving week. An asteroid named 2024 PT5 will enter Earth's orbit, get caught there from Sept.

A small asteroid named 2024 PT5 will temporarily become Earth’s second moon, orbiting the planet before drifting away from its gravity.