Mercury was the “messenger of the gods” and symbolized communication. Astronomers—who study the positions and motions of the planets—call it retrograde motion and regard it as an ...

Mercury is one of the five classical planets visible with the naked eye and is named after the swift-footed Roman messenger god. It is not known exactly when the planet was first discovered - although ...

From January to March, the night sky will host a spectacular parade of planets featuring Venus, Mars, Jupiter, Saturn, Uranus ...