How can we successfully collect and return samples from Mercury and Venus to Earth? This is what a recent study presented at ...

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.

Narrator: As the solar system grew, four rocky planets: Mercury, Venus, Earth and Mars, were created closest to the Sun. Made of rocks and metals, they have solid surfaces and a central core of ...

Despite reaching a huge greatest elongation of 27 degrees west of the sun — farther than on any other date this year — Mercury still stays low and is very poorly placed for most observers in ...