one of the researchers who first suggested that a big planet could be the culprit that was messing with the orbits of some small solar system bodies. "Vera Rubin is our best bet to find it in the ...

Large and small ... the planets in our solar system moved in slightly elliptical orbits four centuries ago. His discovery showed that the sun was at the center of the solar system, not the Earth.

Pluto was once called the ninth planet, but in 2006, scientists changed its status to a dwarf planet. A planet must clear its orbit of other objects, but Pluto shares its space with many small icy ...

Floating around at the edge of the Solar System are leftovers from its formation. This is the Kuiper Belt, which is composed of chunks of rock and ice like comets, dwarf planets, and random objects ...

Whether or not the evolution of the planets and moons in the Solar System is typical for their class of objects is still unknown. A key element of this research theme is the search for small, ...

Planet Mars, explained Mars has not only the highest highs, but also some of the solar system’s lowest lows ... the red planet gained its two small and irregularly shaped moons, Phobos and ...

But the astronomer did not ... body found in the solar system in more than a century. Since Eris was more massive than Pluto, astronomers soon began debating what it means to be a planet, a ...