Astronomers are just beginning to scratch the surface of the complex, and sometimes violent, relationships between planets ...

The New Horizons Pluto flyby revealed unexpectedly complex geological features on dwarf planets, prompting further investigation into the diversity within the Kuiper Belt. Several dwarf planets, ...

A rare exoplanet that should have been stripped down to bare rock by its nearby host star's intense radiation somehow grew a puffy atmosphere instead—the latest in a string of discoveries forcing ...

Astronomers have discovered a distant exoplanet with a tail that stretches over 5.5 million miles long. Credit: Jose-Luis Olivares / MIT illustration Astronomers have accidentally found a planet with ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers have ...

A strange 200 million-year-old object with the mass of a planet has been discovered 20 light-years from Earth, outside our solar system. The "rogue," as it's referred to by researchers, is producing ...

Artist's concept depicts new research that has expanded our understanding of exoplanet WASP-69 b's "tail." NASA/JPL-Caltech/R. Hurt (IPAC) Astronomers using the W. M. Keck Observatory in Hawaii have ...

National Geographic is getting weird tonight—literally. Across six episodes, National Geographic's new show Planet Weird is celebrating some of the planet's most extraordinary wild characters, each ...

Washington, DC – Using a network of small automated telescopes known as HAT, Smithsonian astronomers have discovered a planet unlike any other known world. This new planet, designated HAT-P-1, orbits ...