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

Researchers discovered Eos, a molecular cloud, using ultraviolet light. It is near Earth and lacks carbon monoxide. This ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

An international team used 40 years' worth of data from two space probes to track down what they believe are signs of this ...

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

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

An international team of scientists led by a Rutgers University–New Brunswick astrophysicist has discovered a potentially ...

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.

Our solar system may have a ninth planet after all ... that it could take between 10,000 and 20,000 years to orbit the sun, according to the paper. Two deep infrared surveys taken 23 years ...

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

The solar system is our cosmic neighborhood, made up of the sun and everything that orbits it — planets, moons, asteroids, comets, and even dust and gas. The order of the planets in the solar ...

Researchers have found a candidate for the hypothetical Planet Nine, which could be an undiscovered giant planet way out in ...