Mercury, retrograde

As the orbit of Mercury around the Sun is tilted compared with the orbit of the Earth around the Sun, the planet normally appears to pass above or below our nearest star. A transit can only ...
In astronomy, what does retrograde mean? And what connection does it have to astrology? We explain how planets move across ...
The truth, however, is way more interesting. It's not exactly rare. That’s because Mercury orbits the sun every 88 days. An inner planet to Earth—so closer to the sun—it completes just over ...
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 ...