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

Jupiter's already the big kahuna of the Solar System, an absolute unit of a planet with a mass 2.5 times greater than all of ...

The study by Konstantin Batygin of Caltech and Fred Adams of the University of Michigan pulls off a rare feat in planetary science. They have reconstructed Jupiter’s physical state at a precise moment ...

Recent calculations suggest that Jupiter, our solar system's largest planet, was once more than double its current size.

To better understand Jupiter’s primordial stages, researchers turned to the tiniest of the planet’s 92 known moons. Almathea ...

and its massive gravity forced some forming planets into the Sun, where they disintegrated. Along the way, Jupiter flung some smaller rocks out of the solar system altogether; the rest went to the ...

Jupiter wasn’t always the planet we know today—it was once twice as big, had a magnetic field 50 times stronger, and its ...