What is a planetary retrograde? And what connection does it have to astrology? We explain how planets move across the sky.

Mercury retrograde 2026 will bring several key periods influencing communication, technology and decisions. Discover what it ...

Skywatchers across the Northern Hemisphere have caught a fleeting glimpse of Mercury as it made one of its final visible appearances of the year. Appearing low on the southwestern horizon just after ...

Turns out, it's as tough to drop inward into the inner solar system, as it is to head outward. The problem stems from losing momentum from a launch starting point on Earth. It can take missions ...