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

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

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 starts Monday, November 25 and goes through December 15. Here's what to know about how the last Mercury ...

We view the night sky from a moving platform. Earth orbits the sun at a different rate than any other planet. When Mercury and Earth are at their closest, Mercury appears to go backward ...

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

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.

These particles are likely ejected by micrometeorites or the solar wind, providing a three-dimensional view of the small planet's ... designed to explore Mercury, the closest planet to the Sun.