An international team of astronomers has discovered a distant planetary system that challenges long-standing theories of how ...

New research using NASA’s James Webb Space Telescope examines the maximum sizes of gas giant exoplanets, measuring chemical compositions and formation processes in the HR 8799 system.

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

Gas giants possibly developed slowly in the solar system. They developed cores layer by layer within a disk of ice and dust ...

Rogue planets may be more common than we thought, and they may form alone in the void in the same way stars do, suggests a recent study. We think we know how the universe is structured: Moons orbit ...

Since the 1990s, scientists have discovered approximately 6,100 planets outside our solar system, called exoplanets.

Deep in the older, denser reaches of the Milky Way, there is a red dwarf star that shouldn’t exist — or at least, its family ...

Far beyond our solar system, in the distant Pegasus constellation, lies a star system that is reshaping our understanding of planetary formation. HR 8799, located 129 light-years away, is home to a ...

It could be argued that one of the most perplexing aspects of our solar system is the fact that not every planet is a nice, solid rock like Earth. Some are literally, almost entirely, made of gas. You ...

It’s hard to build a family these days — and that’s especially true when the neighbors’ stellar winds keep eroding all the gas out of your protoplanetary disk. A team of astronomers recently watched ...

Scientists have identified a rocky outer planet in a system where a gas giant was expected. The discovery challenges ...

At night, seven-year-old Miguel likes talking to his father Cesar Rubio about planets and stars. “I try to nurture that,” says Rubio, a machinist in Pomona, California, who makes parts for mining and ...