Mercury may be the closest planet to the Sun, but it's long been overshadowed in scientific exploration. With only two missions ever reaching it - most recently NASA's MESSENGER - the planet remained ...

Mercury has the shortest and fastest orbit around the Sun and experiences dramatic temperature changes as it rotates. It is a world of extremes. Explore facts about our solar system's fastest planet.

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...

"This makes these unlit craters some of the coldest places in the Solar System, despite Mercury being the closest planet to the Sun!" the ESA marveled. What's more, these craters could harbor ...

Venus and Saturn will be the easiest to spot — but for those with a clear view of the horizon, Mercury can be observed hanging low and bright in the cosmos. This planet parade — when planets ...

Save guides, add subjects and pick up where you left off with your BBC account. Narrator: As the solar system grew, four rocky planets: Mercury, Venus, Earth and Mars, were created closest to the Sun.