Devil Comet April 2024. Researchers used the lowell discovery telescope in flagstaff, ariz., to analyze its brightness as its icy and rocky surface reflected light from the sun. A devil comet is about to rear its icy green head over earth — but you'll have to look soon to spot it.

An unusual horned comet, nicknamed the “devil comet,” will make its closest approach of earth on sunday. Researchers used the lowell discovery telescope in flagstaff, ariz., to analyze its brightness as its icy and rocky surface reflected light from the sun.