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

All planets appear this way from Earth at various points, as they orbit the Sun at different speeds. People have observed Mercury going into retrograde for thousands of years, and many believers ...

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 ...

Its radius, the distance from the core's centre to the surface, is 2,440 kilometres. Mercury is about 2.6 times smaller than Earth. How hot is Mercury? Mercury's sun-facing side is scorched by ...

Mercury ' s inner core is solid and about the same size as Earth ' s inner core, a new study using observations from NASA's MESSENGER mission has indicated. Mercury is the smallest planet in our ...

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

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

Mercury goes retrograde from Nov. 25 until Dec. 15, with no shortage of passed-down mythologies and theories.