retrograde refers to when a planet appears to go backward in its orbit as viewed from Earth. Astronomers call this “apparent retrograde motion” because it is an optical illusion. Mercury ...

Turns out, it's as tough to drop inward into the inner solar system, as it is to head outward. The problem stems from losing ...

Seven planets will align in a rare "parade" on Friday, Feb. 28, 2025. Here's tips to get the best viewing possible.

Its radius, the distance from the core's centre to the surface, is 2,440 kilometres. Mercury is about 2.6 times smaller than Earth. How hot is Mercury? Mercury's sun-facing side is scorched by ...

While planets, Mercury included, do not move backwards, they do slow their proverbial rolls, a deceleration that looks like a reversal from our vantage here on beautiful, broken planet Earth.

Mercury ' s inner core is solid and about the same size as Earth ' s inner core, a new study using observations from NASA's MESSENGER mission has indicated. Mercury is the smallest planet in our ...

He can no longer eat the fish he catches from the lake near his home in Georgia. Mercury from industry has seeped into its waters. At the bottom of the food chain, bacteria here transform this ...