A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

Jupiter, the largest planet orbiting the sun, used to be much bigger and stronger when the solar system was just beginning to ...

To better understand Jupiter’s primordial stages, researchers turned to the tiniest of the planet’s 92 known moons. Almathea ...

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

New research suggests that our entire solar system is vulnerable to being thrown into chaos by a distant star.

The ice on the surface of Jupiter's massive moon Europa is constantly changing, hinting at the presence of a subsurface ocean ...

Jupiter may have once been more than twice its current size, with a magnetic field 50 times stronger, say scientists who ...

Stunning new Jupiter photos from NASA’s Juno spacecraft reveal storms, cloud bands, and its volcanic moon Io as the mission ...

In the search for planets beyond our solar system, many scientists focus on finding worlds that could support life. But ...

NASA's Hubble Watches Jupiter's Great Red Spot Behave Like ... event was caused by a planetary system with an Earth-like planet and brown dwarf. The star type was uncertain. The team has ...

Astronomers have long been intrigued by the makeup of the asteroid belt’s largest body. When it was first spotted in 1801, ...