An international team of astronomers reports the discovery of a new giant exoplanet around an M-dwarf star (GEMS). The ...

One Pluto year equals 248 Earth years. At 1473 miles in diameter—about half the width of the United States—Pluto is the ...

The fundamental building blocks for planet formation can exist even in environments with extreme ultraviolet radiation, ...

Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million ...

"The Krokodillen rocks formed before Jezero Crater was created, during Mars' earliest geologic period, the Noachian, and are ...

This week, an old astronomical controversy is renewed as researchers present new evidence for a hidden "Planet X" in our ...

A team from the University of Arizona has made a startling new discovery about the formation of Pluto and its moon. Published ...

Billions of years ago, in the frozen edges of the solar system, a violent impact shaped one of space’s oddest pairs. Instead of a typical planet-moon setup, Pluto and Charon became a binary system.

When we accounted for their material strength, we discovered something ... internal activity long after their formation. The implications extend beyond Pluto and Charon. Other binary systems ...

Astronomers claim to have discovered a new ninth planet in our Solar System. Planet Nine, also known as Planet X, is a hypothetical celestial object that would distantly orbit our Sun – but ...

Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, dubbed Planet Nine, could explain the unusual clustering ...

A meteorite found in Antarctica in 2012 suggests Earth may have formed with the materials needed to make water, a new study hints.