Eleven times wider than Earth. Over 300 times more massive. And a million times more terrifying. Jupiter may look like a ...

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper ...

Dark matter is one of the biggest puzzles in science. Although it makes up about 85 percent of all matter in the universe, it ...

"This discovery was partly serendipity! But, we believe there are many more such opportunities hidden in Hubble data." ...

NASA scientists have discovered an electric field encompassing Earth’s atmosphere that is as "fundamental" as gravity -- and could even give clues about possible life on other planets.

Researchers suggest gas giants might gather dark matter until their cores collapse into planet-sized black holes.

Four and a half billion years ago, Jupiter rapidly grew to its massive size. Its powerful gravitational pull disrupted the ...

With luck, Rubin could even spot Planet Nine itself, Mike Brown says, though he admits it’s possible that the elusive world may prove too faint for the new telescope.

One of the brightest stars in the night sky seems to be orbited by a planet like Jupiter. The news is sure to cheer fans of ...

Gas planets are not the only example of celestial bodies that resist diffusion due to gravity. Like gas planets, “stars are just giant balls of gas,” said Knittle.