The world’s premier space observatory has spotted a mysterious and huge, free-floating planetary-mass object that’s “just 20 light-years from Earth,” NASA announced. Researchers recently used the ...

IT’S been nearly 40 years since the first planet outside of our Solar System was discovered. Since then, more than 5,800 weird and wonderful worlds across 4,300 planetary systems have been ...

The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The ...

An international team of astronomers reports the detection of two new brown dwarfs orbiting distant stars using NASA's ...

Apropos of its reputation for living large and betting big, Jupiter is the largest planet in our solar system. Jupiter is the Roman equivalent of god daddy Zeus, and we can think of the planet as ...

Saturn was already the reigning champion in the moon department. Now, with 274, Saturn has more moons than all the other ...

If you find Jupiter, you’ll likely see four small dots to the side of the gas giant: they are the Galilean moons, four of the 95 natural satellites around the Solar System’s largest planet.

The objects around the ringed planet are tiny, but some of them may have formed relatively recently in the solar system’s ...

Its atmosphere is mainly composed of hydrogen and helium, like that of Jupiter, our solar system's largest planet. But WASP-121b's atmosphere is not like anything ever seen before. The researchers ...

The number of known moons in our Solar System has been rising for centuries, but astronomers say it has probably peaked – for ...