New images of a young star, 2MASSJ1612, could have captured the birth of a giant gas planet larger than Jupiter.

An international team of astronomers led by the University of Galway has discovered the likely site of a new planet in formation, most likely a gas giant planet up to a few times the mass of Jupiter.

The breakthrough came using a cutting-edge observational method that detects unseen planets via subtle deviations in their ...

After its discovery in 1930, Pluto was declared the ninth planet in our solar system ... new requirements for planetary status—kicking Pluto out of the club and into the newly defined category ...

Researchers found the object named 2017 OF201 while searching for "Planet Nine" - a hypothetical planet thought to exist ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

James Webb Space Telescope observations suggest Pluto’s atmosphere is unlike any other in the solar system, confirming a 2017 ...

The discovery of a Saturn-sized gas giant orbiting a small red dwarf is urging astronomers to reconsider their theories of ...

The Milky Way may merge with the Large Magellanic Cloud in 2 billion years, not Andromeda, contrary to previous findings.

Some scientists think they discovered a new dwarf planet at the edge of the solar system, so far away that it takes around 25 ...

Astronomers have spotted a cosmic mismatch that has left them perplexed - a really big planet orbiting a really small star.

Giant planets are not rare per se — after all, we have four in our own solar system. Such large worlds are, however, rarely ...