Mercury takes only 88 Earth days to orbit the sun.

Dwarf planet Pluto, on the other hand, has a fairly squashed orbit. Mercury, the closest planet to the sun, has the most eccentric orbit, with the difference between the distance at perihelion and ...

NASA shares an iconic image of carbon dioxide ice erupting in geysers when Martian winter turns to spring.

Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

and each travels on its own path around the sun. But of these planets, which is nearest to the sun? Mercury is a strange little world. There are some craters on its surface that never see sunlight.