A ninth planet the size of Neptune may be hidden in the far reaches of the solar system, but the evidence has left some ...

Billions of years ago, in the frozen edges of the solar system, a violent impact shaped one of space’s oddest pairs. Instead ...

In 2005, thanks to Michael Brown’s scientific antics, Pluto was removed from the list of planets in the solar system. In 1968, the Apollo 8 mission flew around the moon. In 2001, Chris Hadfield became ...

And Back - The Super Soldiers Defending the Kuiper Belt On April 7, 2016, the team running NASA’s New Horizons mission were ...

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

Find out which zodiac signs will be affected in profound and unique ways when Pluto enters retrograde in 2025, triggering a ...

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

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.

NASA's newest space telescope, on a mission to study origins of universe, snapped incredible images of the cosmos 2 months ...

NASA scientists expected something strange when they planned a mission beyond Pluto - but Arrokoth exceeded all predictions.

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

Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, ...