Gas giants are large planets mostly composed of helium and/or hydrogen. Although these planets have dense cores, they don't ...

SIGNS of an alien planet that’s about the same size as Earth have been picked by up a Nasa telescope. Scientists say it might ...

Hubble observations reveal a giant, turbulent planet-forming disk that may reshape theories of how planetary systems develop.

Stars and planets are inextricably linked. They form together and stars shape the fate of planets. Stars create the dusty protoplanetary disks that give birth to planets of all kinds. And when a star ...

Astronomers have detected a massive, lonely world drifting through the darkness without a star to call home. This Saturn-sized rogue planet was discovered by an international team of scientists using ...

Scientists using NASA’s James Webb Space Telescope have observed an entirely new type of exoplanet whose atmospheric composition challenges our understanding of how this type of planet forms. This ...

Is it a two-for-sun deal. Astronomers were blown away after discovering a bizarre exoplanet that orbits twin stars closer than any ever seen before in a binary star system, per a starry study ...

Astronomers studying extreme planetary systems have identified worlds so massive that they rival the smallest stars in size. These giant planets blur the line between planetary and stellar ...

It’s a sweltering Tuesday in Washington, D.C., the kind of day that stretches the definition of Earth as a “habitable” planet. But on an eighth-floor terrace near the U.S. Capitol building, dozens of ...

A mysterious comet flying through our solar system may be doing more than just passing by—it could help explain how giant planets like Jupiter are born. At a major planetary science conference in ...

The number of confirmed planets outside of our solar system—known as exoplanets—has risen to 6,000, NASA has said. There is huge variety across these distant worlds, the space agency says, with ...