Researchers found the object named 2017 OF201 while searching for "Planet Nine" - a hypothetical planet thought to exist ...

Discover interesting facts about the sun, the solar system's central star that supports all life on Earth.

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

James Webb Space Telescope observations suggest Pluto’s atmosphere is unlike any other in the solar system, confirming a 2017 ...

The discovery of a Saturn-sized gas giant orbiting a small red dwarf is urging astronomers to reconsider their theories of ...

For decades, Pluto was thought to be just another frozen rock spinning around the Sun, far from the action and mystery of the ...

Hubble Space Telescope observations of white dwarf star G238-44 has shown that it is "consuming both rocky-metallic and icy material, the ingredients of planets," according to NASA's Goddard Space ...

Some scientists think they discovered a new dwarf planet at the edge of the solar system, so far away that it takes around 25,000 years to complete one orbit around the sun. Astrophysicist Dr. Paul ...

Scientists' best explanation for how planets form is called the core accretion theory. The birth of a planetary system begins ...

A small red dwarf star is challenging our knowledge of how planets form by coexisting with a massive exoplanet, much like a ...

Astronomers have been left puzzled by the discovery of an unusually large planet orbiting a remarkably small star, a cosmic ...

The discovery defies current understanding of how planets form. The star is only about a fifth the mass of the sun. Stars this size should host small planets akin to Earth and Mars under the leading ...