An alternate explanation that fits the evidence is that Vesta was once part of a planet – but which planet that might been ...

Discovered in 1930, Pluto was long considered our Solar System's ninth planet, but was unseated in 2006 after the discovery ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Researchers say they found a curious dot on infrared images taken 23 years apart that seems to be moving in a manner consistent with a large, distant planet.

Thanks to JWST, we've learned key details about methanol — a key building block for organic compounds necessary for life — on ...

The Hubble Space Telescope time-lapse captured footage of Jupiter, Saturn, Uranus and Neptune. Credit: SCIENCE: NASA, ESA, ...

“Now we can go and find this planet and make the solar system have nine planets once again.” In a NASA post, titled “Is Planet X real?”, the space agency lays out the research done by ...

Astronomer Eliza Kempton said that she had waited her "entire career" to peer into an atmosphere from this mysterious class of planets.

The James Webb Space Telescope spotted possible signatures for life in an exoplanet's atmosphere. Still, researchers caution it’s far too early to call the findings definitive ...

objects from the Kuiper Belt orbit in the opposite direction from everything else in the solar system, according to NASA. This could be the result of a gravitational pull from a nearby planet, the ...