Look into the sky this month and you will be able to see a comet that hasn’t visited Earth in 80,000 years.

Comet C/2023 A3 (Tsuchinshan-ATLAS) this week becomes visible low in the west following sunset, according to NASA.

If the comet’s tail is well-illuminated by sunlight, it could be visible to the unaided eye. Starting Monday through Oct. 24 is the best time to observe, using binoculars or a small telescope.

The comet is nearly 2 miles in diameter and its tail of dust and gasses extends for tens of millions of miles, according to Bill Cooke, lead of NASA’s Meteoroid Environment Office at the Marshall Space Flight Center in Huntsville, NPR reported.

Though the comet is very old, it was just discovered in 2023, when it approached the inner solar system on its highly elliptical orbit for the first time in recorded history.

The comet is described as like a big, thick-walled bubble made of icy pieces of space debris the sizes of mountains.

The comet comes from the Oort Cloud, a giant spherical shell believed to surround our solar system.