Previously considered an airless ball, an Earth-sized world orbiting a red dwarf some 40 light-years away may have an ...

An ancient exoplanet dated at 12.7 billion years old could have formed over a long period in a giant disk of gas, according ...

Mercury is the least explored of the four rocky planets in the inner Solar System. It wasn’t until 2011 that NASA’s MESSENGER ...

The universe is full of surprises—like planets so massive they outsize some stars. Explore the fascinating size comparisons ...

It seems 2025 will have a strong start, too, with a planet parade just a few weeks into the new year. A planet parade is when ...

An exoplanet in the Trappist star system — a multi-planet star system similar to the solar system and just 39 light-years ...

New observations show that newly formed planets close to a star help shepherd dust and gas to create more planets farther out ...

The Webb telescope has confirmed a controversial discovery made over 20 years ago with the Hubble Space Telescope.

New observations of TRAPPIST-1b using the James Webb Space Telescope have provided detailed insights into the potential atmospheres of exoplanets orbiting red dwarfs. The study analyzed broadband ther ...

Just as some children physically resemble their parents, many scientists have long thought that developing planets should ...

The best telescopes for seeing planets give you the clearest views of ... but January offers some of the best planetary views all year. On January 9-10, Venus reaches its greatest eastern ...

Skeleton Crew is a fun new series that has unleashed many mysteries about missing planets tied to an ancient time.