How far it is from the sun: 886 million miles (1.4 billion kilometers), on average How big it is: 72,400 miles (116,500 km) across, or almost 10 times the size of Earth. How many moons it has: At ...

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

Mercury is the innermost and smallest of the eight major planets in our Solar System, orbiting closest to the Sun. Though ...

Ah, Earth. We may not think about our planet on a day-to-day basis, but the world we live in is a pretty interesting place. The third rock from the Sun—and to this day, the only one with known ...

Starting today (January 25), till February and March, the sky is going to be full of stars! However, there is room for a slight rectification here, as the marvelous astronomical event has been tagged ...

Alexandra Navrotsky knows a lot about the little things. She is a leader in the field of nanogeoscience, which centers around how nanoparticles lead to mineral formation in geological systems. In over ...

Discover Earth’s unique features—water, atmosphere, magnetic field, life-supporting climate, and 10 key facts about our home planet. Learn what makes Earth truly special.