In its earliest days, Jupiter may have been even more colossal than it is now—twice as large, in fact, with a magnetic field ...

The King of the Planets teams up with an exceedingly narrow crescent moon for the last time this year in the evening sky on ...

Understanding Jupiter's early evolution helps illuminate the broader story of how our solar system developed its distinct ...

With an atmosphere, by mass, of primarily hydrogen (76 per cent) and helium (24 per cent), and by volume of 89 per cent ...

Jupiter may have once been more than twice its current size, with a magnetic field 50 times stronger, say scientists who ...

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

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.

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

Stunning new Jupiter photos from NASA’s Juno spacecraft reveal storms, cloud bands, and its volcanic moon Io as the mission ...

This diagram shows the orbital distribution of extrasolar planets smaller than Jupiter that have been detected by the Kepler mission, in comparison to the orbits of Mercury, Venus, Earth, and Mars.

If you're lucky enough to have clear skies tonight, you can catch a "mini planet parade" as Mars and Jupiter appear alongside a half-lit moon in the southwestern sky. All three bodies will be ...