The comet 21P/Giacoboni Zinner (affectionately called just 21P) is gearing up to make a close pass by earth, and if you’re lucky you’ll see it appear in the night sky.
How to See the Comet 21P Pass By Earth This Month
The comet 21P/Giacoboni Zinner (affectionately called just 21P) is gearing up to make a close pass by earth, and if you’re lucky you’ll see it appear in the night sky.