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

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Four light-years away from Earth, the Alpha Centauri triple-star system has long been a compelling target for scientists to search ...

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 ...

A newly studied solar system breaks the usual planet pattern, raising fresh questions about how rocky and gas planets form.

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

Based on new simulations, scientists believe that giant gas planets across the universe can often collide and merge into even bigger gas plants — behemoths called "super-Jupiters." In the cosmic ...

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

Astronomers just discovered a gas giant on its way to becoming a hot Jupiter — and it’s extremely weird. An exoplanet on a twisted, backwards orbit may offer clues about how hot Jupiters (giant gas ...

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) found a young star surrounded by an astonishing mass of gas. The star, called 49 Ceti, is 40 million years old and ...