Mention the word “mercury” and one of two things comes to mind: the silvery metal that is liquid at normal temperatures, or ...

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 ...

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.

Europe's BepiColombo mission will enter orbit of the solar system's first planet in about two years, but it's been whizzing past Mercury regularly as it lines up its approach. The ESA reports that ...

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. It also has the most extreme temperatures of ...

When someone mentions a “doubleheader,” we usually think of two baseball games played back-to-back by the same pair of teams. To railroad employees, the word refers to a train pulled by two ...