Ammonite was discovered using the Subaru Telescope in Hawaii, with follow-up confirmation from the Canada-France-Hawaii Telescope. Its orbit and size officially qualify it as a distant dwarf planet.

Astronomers using the Hubble Space Telescope have observed a white dwarf - a highly compact stellar ember - that appears to ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

"The profile of the occultation was most consistent with it being a new satellite — a new moon — going around Quaoar." ...

Using Pluto as an example, this celestial body, once considered the ninth planet, was redefined as a dwarf planet in 2006. Its average distance from the Sun is about 5.9 billion kilometers, a distance ...

Though no direct evidence of life has been found, models suggest Ceres had hot water shooting into its underground oceans ...

The methane gas may constitute a rarefied atmosphere, or it may come from erupting plumes on Makemake’s surface.

New observations suggest that the dwarf planet Makemake is surrounded by faintly glowing methane gas. Scientists are unsure ...

The discovery of the Kuiper Belt fundamentally reshaped our understanding of the solar system's architecture and population, revealing a far larger and more complex system than previously imagined.