Astronomers have identified an extreme exoplanet, LTT 9779 b, that is reshaping our understanding of planetary atmospheres.

Astronomers have found four small planets orbiting Barnard's Star, the second-closest star system to Earth. These planets are ...

Researchers discovered a planet-forming disk that lasted 30 million years. This challenges previous estimates of 10 million ...

Using the James Webb Space Telescope (JWST), astronomers have peered into the atmosphere of a cosmic body that could be a ...

After many previous claims and false alarms, astronomers can finally confirm the existence of at least four planets less ...

The ringed giant's moons also vary considerably in size. The largest, Titan, is bigger than the planet Mercury ... resemblance to the fictional Death Star in the "Star Wars" movies.

The shape of a planet's orbit is one of its fundamental properties, along with its size and distance from its host star.

A new study presents a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are 1 to 4 times the size of Earth and among the most common in our galaxy. Using ...

While unraveling the mystery of why some planet-forming disks fall onto their stars, an astronomer stumbled upon a surprise: ...

Scientists from UNSW Sydney have located a potential new exoplanet—a planet that orbits a star outside of our solar ...