If you look at the morning sky this month, you might notice a rare celestial body. 

NASA says a glowing green comet will make an appearance for the first time in 50,000 years.

It will have streaking tails of dust, and could appear fuzzy.

The comet will be closest to the sun on Thursday and closest to the Earth between Feb. 1 and Feb. 2.

NASA says skygazers in the northern hemisphere should be able to see the comet in the morning sky throughout January.

People in the southern hemisphere should be able to see it in early February.

The comet was first discovered last March.