Scientists have unlocked one of the solar system's many secrets from an unexpected source: a planetarium show.

A recently discovered celestial body is rewriting our knowledge of the Kuiper Belt and maybe challenging the existence of the ...

The International Astronomical Union’s Minor Planet Center, which catalogs new moons and other small bodies in the solar ...

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

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...

Astronomers have discovered a mysterious dwarf planet, 2017 OF201, far beyond Pluto. This discovery challenges existing ...

The universe is a complete unknown to humans. We are not yet able to control and understand the system in which Earth is located, as evidenced by the possible discovery made by a g ...

The newly discovered object, named 2017 OF201, has a 25,000-year orbit and is believed to be a large contender for dwarf ...

Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the ...

A new dwarf planet discovery in the outer solar system is challenging the long-standing theory of a hidden giant planet ...

Pluto has never been much of a planet — small, wired orbit, not much atmosphere — and questions about its status have been raised periodically since its discovery 76 years ago. This week ...