Mercury has made a rare transit, where the planet passes across the face of the Sun as seen from Earth. During the transit, Mercury appeared as a dark silhouetted disc against the bright surface ...

Mercury retrograde is a fascinating natural phenomenon that can open your eyes to the inner workings of the solar system.

Mercury is a little-known, still mysterious world. But one thing is certain. Mercury, the closest planet to the sun, can't ...

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

Rather it is a matter of perspective that comes from the moving Mercury overtaking slower-moving Earth as both worlds race around the sun. The result is that Mercury appears to reverse its motion ...

Mercury, though very small, has a magnetic field that creates a protective “bubble” around the planet: the magnetosphere. This field is about 100 times weaker than Earth's but interacts intensely with ...

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.