The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

This would see the mission going from an elliptical to more circular orbit over a six-year span, though mission planners hope for a decade of science and observations around Mercury. Solar sailing ...

The Milky Way is known to host a diverse array of planetary systems, providing astronomers with extensive insights into how ...

NASA's Messenger mission unveiled the first picture of the planet Mercury taken by an orbiting spacecraft on Tuesday, and promised to provide more goodies in the days and months to come.

Astronomers from MIT have uncovered a dramatic celestial spectacle: a Mercury-sized exoplanet that is rapidly disintegrating ...

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.

Perihelion Day is the annual astronomical event when Earth reaches its closest point to the Sun in its elliptical orbit. On Perihelion ... For example, Mercury, the closest planet to the Sun ...