Scientific American spoke with the astronomer who has contributed to the discovery of two thirds of Saturn’s known moons ...

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.

The study by Konstantin Batygin of Caltech and Fred Adams of the University of Michigan pulls off a rare feat in planetary ...

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

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

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 ...

According to their work, Jupiter's radius was once two to two-and-a-half times its current radius—large enough to contain ...

The new calculations, described in a paper published Tuesday (May 20) in the journal Nature Astronomy, suggest that just 3.8 ...

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

Curious about how many moons Mars has? Discover fun facts about Phobos and Deimos — Mars' two tiny moons — including their ...

If you have a question you’d like an expert to ... This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being.

South African President Cyril Ramaphosa said his visit to the White House on Wednesday was "a great success" even though a confrontation during the meeting with President Donald Trump over allegations ...