"Mercury is difficult to study because it is a small planet that lies between us and the sun. Most of the time, it is hidden ...

Mercury reaches its peak evening visibility this February, offering Northern Hemisphere observers a longer post-sunset viewing window, higher altitude and a crescent moon reference.

Explore the visibility of Mercury, Venus, Jupiter and Saturn in February 2026. Discover observation dates, locations and details based on Space.com and NASA data.

For decades, Mercury has been seen as astatic, heavily cratered planet, a relic of early Solar System history. Its surface, ...

NASA's Mercury-orbiting spacecraft, Messenger, is going out with a bang this week, adding a hefty crater to the little planet closest to the sun. The first spacecraft to circle Mercury, Messenger is ...

Learn about the bright streaks that may represent recent geological activity on Mercury, which has been considered a dead ...

Although Mercury was geologically active in its early days, today its surface appears almost completely static. This is why ...

A European-Japanese space mission will reach Mercury in 2026, carrying instruments designed to answer a question that has quietly unsettled planetary science for decades: how does a planet like this ...

Jan. 31 marks the day Ham, a chimpanzee, was launched into sub-orbital space in a Mercury capsule aboard a Redstone rocket to ...