A groundbreaking study has unveiled a startling portrait of Jupiter‘s early days, revealing the gas giant was once nearly twice its current size and wielded a magnetic field about 50 times ...

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 rest of the planets combined. Prepare, then, to have your mind ...

A massive, fast-orbiting planet is inching closer to its star, and scientists now have direct evidence of its impending ...

Exoplanet HIP 67522 b, fluffed up to the size of Jupiter, circles so close to its star that it’s triggering violent flares — bursts of high-energy radiation — from its host that then blast ...

Try more than double its current size, according to new research from Caltech and the University of Michigan — boasting enough volume to fit 2,000 Earths inside it with room to spare.

American space agency NASA says it used the gravity assist maneuver the Europa Clipper conducted back in March to test the ...

A hot Jupiter-like planet, HIP 67522 b, is causing its young solar system to erupt with solar flares, potentially leading to the planet’s atmosphere being stripped away and shrinking it to ...

The planets circle tightly around a dim dwarf star called Trappist-1, barely the size of Jupiter. Three are in the so-called habitable zone, where liquid water and, possibly life, might exist.