Tsuchinshan-atlas

Tsuchinshan-ATLAS, like all comets, is a frozen chunk of leftover material from the birth of the solar system. The comet begins to melt as it nears the sun, causing the ball of ice to sprout a diffuse tail.

With an orbit of 80,000 years, Comet A3 Tsuchinshan-ATLAS was last visible from our planet during the era of the Neanderthals, according to NASA.