Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million ...

A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

Jupiter, the largest planet orbiting the sun, used to be much bigger and stronger when the solar system was just beginning to ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, researchers say.

Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

Once thought to be a barren, rocky body, known as Ceres, it is now revealing itself as something far more interesting, in the ...

Astronomers have discovered that the Jupiter, the largest planet in our Solar System, was once so big that it could have held ...

The presence of this planet would explain a number of quirks in our Solar System, but there is ... for the existence of Planet Nine. NASA added: "Another possibility is that Planet X (Planet Nine) ...

A new member of the solar system has been detected, the second-largest of its kind, suggesting there may be more like it ...

T he Solar System has just gotten a new official member. Currently, with the name of 2017 OF 201, this is a trans-Neptunian ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...