The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

Using two infrared space telescopes and a 23-year gap, scientists may have spotted a mysterious, slow-moving object beyond ...

A team of astronomers poring through old astronomical data may have seen a candidate for the elusive Planet Nine – a ...

The search for a hidden giant lurking in the far reaches of the Solar System has captivated astronomers for decades. A new ...

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is hidden in our solar system.

Astronomers using the James Webb Space Telescope have directly detected the faint glow of a planet that’s colder than any ...

Scientists believe that they've discovered a new planet which may be part of the Earth's solar system. Thanks to advancing ...

Venus is the hottest planet in the solar system due to its thick carbon dioxide atmosphere, trapping heat as part of a ...

"This is the 5th largest planet in our solar system, lurking out ... might find some more minor planets, ones whose orbits might be affected by Planet 9. And that could provide additional evidence ...