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

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 ...

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 dark nebula is part of the Circinus West molecular cloud, which stretches for 180 light-years, containing a mass 250,000 ...

Now, a new study has whittled a list of 13 candidates down to just one potential object slowly moving around our sun ...

The robotic Cassini spacecraft which is now orbiting Saturn looked back toward the eclipsed Sun and saw a view ... into the deepest reaches of our solar system. These probes, unlike the Hubble ...

It has a weight greater than 5,000 times the Sun's weight and is ... regarding the ways and locations of star births within our galaxy.

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

The sun doesn't just shine—it blows ... propel fast solar wind streams of charged particles that race across our solar system. The research also delivers a major advance in space weather ...