The Kuiper Belt is an elliptical plane in space spanning from 30 to 55 times Earth's distance from the sun, or 2.5 to 4.5 billion miles (4.5 to 7.4 billion kilometers).

The Keck Observatory and NASA’s Hubble Space Telescope may have uncovered a "potential three-body system in the Kuiper Belt," ...

According to study co-author Dr Fumi Yoshida, Neptune is the only known massive object near the outer Solar System that could ...

In 2006, NASA launched New Horizons to explore Pluto. In 2019, it visited the furthest object in the Solar System we have ...

Researchers use the Subaru Telescope in Hawaii to find a small object on the outer edge of the Solar System. Nicknamed ...

The Kuiper Belt is a donut-shaped region of icy bodies beyond the orbit of Neptune. Because small Kuiper Belt objects were some of the "feedstock" from which planets formed, this research provides ...

Just how these bodies are composed has been a mystery ever since the first observed Kuiper Belt member, a red Cold Classical named 1992 QB1, was discovered in1992, says Cooper, ...

Evidence for this, Brown says, comes from recent discoveries that large Kuiper belt objects, which can reach diameters in excess of 2,000 kilometres, have widely disparate densities.

The Kuiper Belt isn’t just a uniform collection of icy, frozen rocks. Instead, astronomers can detect lots of different colors in the belt’s bodies, including reds, whites, and blues.

NASA's New Horizons division continues analysis of Pluto data, while planning probe's next fly-by destination, an object named 2014 MU69 in the Kuiper belt.

New Horizons will skim just 2,175 miles (3,500 km) above the surface of MU69 on New Year’s Day 2019. Earth-based studies suggest this Kuiper Belt object could be a binary.