As the most massive planet in the Solar System, and first to form, Jupiter’s gravity shaped the formation of everything else.

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

In the early days of our solar system, when the Sun was still young and the planets were barely formed, Jupiter wasn’t the ...

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

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

The team's calculations indicate that young Jupiter had a radius nearly twice its current size, with a volume large enough to ...