In astronomy, what does retrograde mean? And what connection does it have to astrology? We explain how planets move across ...

Mercury has the shortest and fastest orbit around the Sun and experiences dramatic temperature changes as it rotates. It is a world of extremes. Explore facts about our solar system's fastest planet.

According to many followers of astrology, part of the reason could be the pesky planet Mercury. The basic belief is that when Mercury is in “retrograde”, things may not go as planned more ...

Much closer to the horizon and a distinct reddish color, the planet Mercury isn’t on most people’s observing lists. In fact, a professional astronomer last year told me it was impossible to ...

Narrator: As the solar system grew, four rocky planets: Mercury, Venus, Earth and Mars, were created closest to the Sun. Made of rocks and metals, they have solid surfaces and a central core of ...