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

At the center is the sun, a yellow dwarf star that contains 99.8% of the solar system's mass. Everything else — from the eight major planets to dwarf planets, comets, asteroids, and icy objects ...

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

sitting in the Kuiper Belt - a region in our solar system beyond Neptune filled with icy objects, comets, and dwarf planets like Pluto. Since this hidden planet may be so far away, the new study ...

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.

Pluto remains a fascinating and beloved part of our solar system with a slightly less glamorous title. At this moment, Pluto is still classified as a dwarf planet. Despite ongoing debate and ...

His adventures searching for the mysterious dwarf planets continue! Welcome to SolarBalls! Space animation filled with fun, entertaining animations that also help you learn about the solar system ...

NEW YORK (AP) — A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday ...

NEW YORK (AP) — A new Tatooine-like planet outside the solar system may orbit two failed stars ... A light year is nearly 6 trillion miles. The brown dwarf pair was first spotted years ago.

A new planet like Star Wars' Tatooine detected outside of our solar system may orbit two failed stars ... Can the US get humans to Mars in Donald Trump's second term? The brown dwarf pair was first ...