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 ...

When it comes to planets, bigger is not always easier to understand. The largest planets in the universe are gas giants—massive worlds made mostly of hydrogen and helium, with no solid surface. In our ...

Thanks to the discovery of thousands of exoplanets to date, we know that planets bigger than Earth but smaller than Neptune orbit most stars. Oddly, our sun lacks such a planet. That's been a source ...

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