If Brown’s hidden world is real, Rubin will almost certainly find it or strong indirect evidence that it exists. “In the ...

Venus will pass to the north of the much-fainter bluish star Regulus (in Leo, the Lion) on the morning of Sept. 19; the planet and star will appear low in the east-northeast predawn sky, separated by ...

A new study has looked into the possibility that our Solar System could capture and provide a home for a rogue planet as they ...

It's possible for our solar system to capture a rogue planet and give it a home as it hurtles through the galaxy, according ...

It seems 2025 will have a strong start, too, with a planet parade just a few weeks into the new year. A planet parade is when ...

Test your knowledge on our solar system, from the biggest and smallest planets to the behemoth mountain on Mars.

Encountering Neptune in 1989, NASA’s Voyager mission completed humankind’s first close-up exploration of the four giant outer ...