In appearance it is similar to Earth's Moon. The planet is terrestrial, meaning that it has a solid surface and is mainly made of silicate rocks or metals. The planet Mercury is mainly made up of iron ...

March is here, and Mercury goes retrograde from March 14 until April 7 — the retrograde begins as the full moon and lunar eclipse occur this month, with no shortage of passed-down mythologies ...

It is the smallest planet in our Solar System. Mercury experiences extreme temperatures because it is so close to the Sun. It has no moons. Venus is the hottest of all the planets, despite being ...