These helium worlds would occupy the bottom end of the higher size range, around 2.4x larger than Earth by radius — whether they have an atmosphere rich in hydrogen or helium, the heat from ...

Is Jupiter a failed star, or is it simply a giant planet in our solar system? While Jupiter shares a similar chemical ...

Unlike rocky planets where asteroid impacts leave visible craters, gas giants like Saturn have outer layers of hydrogen and ...

The work has implications for planets outside our solar system, such as K2-18 b and TOI-270 d, which have been argued to be potentially habitable worlds with a hydrogen atmosphere overlying a ...

Sometimes referred to as “giant planets”, these large planets primarily consist of hydrogen and helium, with small amounts of other elements and compounds. They have a massive outer atmosphere ...

An unknown object slammed into Saturn, possibly marking the first time a collision with the planet has been witnessed in real ...

A young planet named HIP 67522 causes violent eruptions on its star, dramatically accelerating the loss of its own atmosphere ...

Researchers have called for the public's help after an image appears to show an unidentified object slamming into Saturn.

PSR B1620-26b remains the only planet to have been found in a globular cluster. All of this evidence points to the most unusual thing about PSR B1620-26b, which is that it is very old.

Planets can be extremely hot when they are born, and new computational experiments show that such planets would have an atmosphere composed of a homogenous mixture of hydrogen and water. As the ...