Learn how a possible ninth planet, the theoretical Planet X, could have acquired its wide orbit in the outer Solar System - a ...

At the very edge of our solar system, beyond the grasp of Neptune and even past the icy sprawl of Pluto’s domain, a new ...

To better understand Jupiter’s primordial stages, researchers turned to the tiniest of the planet’s 92 known moons. Almathea ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

This may explain the strange properties of the orbits of our solar system's planets, which are not quite perfectly circular, and all lie on slightly different planes. NASA artist’s conception of ...

NARRATOR: "Solar System: Strange Worlds ... And what that means is that when Miranda orbited Uranus, it wasn't a perfect circle, it was more in the shape of an ellipse. So, when Miranda is ...

The solar system is the name we use to describe the eight planets, and their moons, that circle, or orbit, around the sun. CHILD: Our planet, Earth, is in the solar system. MADDIE: Mercury is a ...

(bursting) "Solar System: Wandering Worlds," right now on ... Phobos orbits Mars in an almost perfect circle, right along Mars's equator, and this makes us question whether Phobos is really ...