This Is Not a Comet, outer space, space videos

Outer Space - It Is Mercury's Tail Made Out of Sodium. Almost like a big ol' comet, tail streaming millions of kilometres away from the planet, glowing with faint orange-yellow light.

It's all thanks to the planet's position: Mercury is the innermost planet in our Solar System. It's less than half the distance from our star than Earth, an average distance of 58 million kilometres (36 million miles).

At that distance, the small, dense, rocky world is constantly bathed in solar radiation and buffeted by solar wind