While we commonly recognize the likes of Mercury, Venus, Earth, and Mars, these outlying planets offer fascinating insights into the broader nature of our Solar System and the cosmos beyond.With ...

A light-year is 5.8 trillion miles. A pair of planet-hunting satellites — NASA's Tess and the European Space Agency's Cheops — teamed up for the observations that discovered the solar system.

The solar system consists of eight planets, several dwarf planets, hundreds of moons, and billions of asteroids, comets and ...

Mercury, the smallest and least massive of the solar system's planets, also possesses a magnetosphere. However, its magnetosphere is typically only about 5% the size of Earth's.

They say it’s a rare, frozen-in-time cosmic wonder that can help explain how solar systems across the galaxy came to be. The compact in-sync system, announced Wednesday, is 100 light-years away.

Alien planets captured by our sun's gravity could could hide in the shadows of the outer solar system. (Image credit: Wikimedia Commons reproduced under a Creative Commons BY-SA 4.0) ...

CAPE CANAVERAL, Fla. — Astronomers have discovered a rare solar system in the Milky Way that boasts six planets orbiting in perfect rhythm like a cosmic orchestra, untouched by outside forces ...

The planets in our solar system orbit the sun in roughly the same plane, known as the ecliptic, which is tilted relative to Earth's equator by about 23.5 degrees.