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.

A European-Japanese space mission will reach Mercury in 2026, carrying instruments designed to answer a question that has ...

Mercury will reach its highest point in the evening sky tonight (April 11), with the closest planet to the sun shining brightly. Mercury will climb to an altitude of 17 degrees over the western ...

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 ...