Mercury, the closest planet to the sun, is only slightly larger than Earth's moon and is pockmarked with craters. The planet is visible to the unaided eye and as such as has long been known to humans.

Mercury is a planet that just doesn't make sense. It's incredibly small yet hosts a relatively massive core. Mercury is so strange that astronomers have not been able to explain its properties with ...

The solar system is composed of the sun, eight major planets, five dwarf planets, over a hundred moons, and countless comets ...

This quiz will explore the facts, the fun and the fascinating quirks of our solar system's speedster. Mercury may be small, but it's mighty, zipping around the sun faster than any other planet. And ...

So maybe YOU have seen the planet Mercury. But most people have not, or at least they have not realized they’ve seen it. In an extremely unscientific email poll of fifteen of my friends and relatives, ...

View of planet Mercury from space. Space, nebula and planet Mercury. This image elements furnished by NASA. A few evenings ago I found myself in a remote layby in Utah close to Canyonlands National ...

The 2024 astronomical calendar is packed with events; And there's more to look forward to, despite the eclipse and auroras already having passed overhead. Nicknamed the "planet parade," a planetary ...

A five-planet alignment will be visible in the night sky on Tuesday. Don't miss your lucky chance to see the stars -- or planets -- align. A five-planet alignment of Mercury, Jupiter, Venus, Uranus ...