Watch a green comet make its first Earth approach in 50,000 years

An illustration of the night sky on Feb. 1 showing comet C/2022 E3 (ZTF) at perigee.


Comet C/2022 E3 (ZTF) is making its closest pass by Earth, and you can watch it pass by for free without even stepping outside.

On Wednesday (Feb. 1), the comet will reach its closest point to Earth, known as perigee. Comet C/2022 E3 (ZTF) hasn’t been this close in 50,000 years and according to some predictions, it may never be seen again. That makes the close pass this week even more significant, as it could be our last chance to witness this “messenger from the outermost reaches of our solar system.”