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 ...

"There really is something very different about how these giant planets form versus how small planets like Earth form." ...

A phantom “Super-Jupiter” 13 times more massive than our ... to stump astronomers for nearly two decades—is it a rogue planet, failed star, or something else entirely? Thanks to an ...

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

Could a giant planet between Mars and Jupiter have doomed Earth? A new study suggests that small changes would have been manageable, but a massive super-Earth could have made our planet uninhabitable ...

A new study presents a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are 1 to 4 times the size of Earth and among the most common in our galaxy. Using ...

Five planets, Mars, Jupiter, Saturn, Venus and Mercury, will be visible to the naked eye. Picture: iStock Only five planets, Mars, Jupiter, Saturn, Venus and Mercury, will be visible to the naked eye.

AN INCREDIBLY rare celestial display is set to be visible tonight, where seven planets will align in an arc across the sky. Mars, Jupiter, Uranus, Venus, Neptune, Saturn and Mercury will align in ...