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

Astronomers using NASA’s James Webb Space Telescope have taken a major step toward understanding a puzzling type of planet ...

An object seen to have moved in the time between when it was imaged by the IRAS and AKARI surveys in 1983 and 2006 ...

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

The morning of April 24 will give rise to a striking mini-planetary parade, as Mercury, Venus, Saturn, Neptune, and Earth's ...

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

View a brilliant morning star, enjoy dark skies during New Moon, and take in plenty of deep-sky targets in the sky this week.

Space exploration missions have revealed that polar vortices aren’t uncommon beyond Earth. They’ve been observed throughout ...

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...