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 ...

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

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

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

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.

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

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 ...

In contrast, some planets in our solar system have massively different tilts ... so the poles are either completely facing the sun, or not at all, meaning its seasons are intense: Summers are ...

“This hypothetical Neptune-sized planet would circle our Sun on a highly elongated path ... glimpse into what lies at the edge of our solar system. The Vera C. Rubin Observatory will use ...