In the cosmic dance of the solar system, Earth always mocked the Moon for its craters. But cosmic karma is a powerful force..

Astronomers are gathering evidence of a massive hidden planet lurking beyond Neptune. These endangered predators have finally ...

Researchers analyzed nearly half a million nearby star systems to understand how giant planets fare as their stars expand into red giants.

These are America’s best space museums, from the Kennedy Space Center to Houston’s Space Center—they get you up close with ...

Just as Earth orbits the sun, most planets discovered beyond our solar system orbit a host star. But some are out there all ...

For years, scientists believed most mini-Neptunes were covered by vast oceans of molten rock—essentially entire planets made ...

The ESCAPADE mission, short for Escape and Plasma Acceleration and Dynamics Explorers, is the first dual-satellite mission to another planet. Two identical spacecraft will orbit in formation to ...