New research has revealed that mysterious ‘rogue planets’ could be assembling scaled-down planetary systems of their own.

Astronomers have long speculated about the existence of a mysterious planet lurking far beyond Neptune, a world several times ...

Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

An icy object in perfect sync with Neptune reveals new details about planetary migration and unseen bodies far beyond the Kuiper Belt.

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

A team of astronomers from Taiwan has uncovered promising evidence suggesting the existence of Planet 9, a hypothesized ...

A newly found icy object, Ammonite, may be a 4-billion-year-old fossil from the Solar System’s edge—and it’s casting doubt on the Planet Nine theory.

(Web Desk) - Astronomers have discovered a new world circling the outer edges of our solar system. Researchers using the Subaru Telescope, located in Hawaii, spotted a small, distant object called ...

‘Alien: Earth’ Seemingly to Introduce Mysterious New Extraterrestrial Life Beyond the Xenomorphs Our Editorial Policy. The new Alien: Earth teaser has fans buzzing after it seemed to confirm something ...

Temple, TX (FOX 44) — Temple native and astronaut Bernard Anthony Harris, Jr. made history as the first African-American to walk in space. In 1995, Harris completed a feat in his second space… ...

Pluto is considered a Kuiper Belt Object, or KBO. The theoretical planet would be the ninth planet because in 2016 Pluto was downgraded to a dwarf planet after the object Eris was discovered.