"Space snowman" Arrokoth and other Kuiper Belt objects may contain locked-up ancient ice and gas, suggests a new model that could also explain the explosive behavior of "ice bomb" comets passing ...

Arrokoth is a planetesimal in the Kuiper Belt, a vast stretch of space beyond Neptune that holds remnant building blocks of the solar system leftover from our cosmic neighborhood's formation.

The New Horizons team announced yesterday that MU69's official name would be “Arrokoth.” Folks, that’s a good name. You may know this rock as the oddly ...

Arrokoth happened to be roughly in the path of New Horizons after it made its historic flyby of Pluto in 2015. It was spotted by the Hubble Space Telescope in a search for something New Horizons ...

For millennia, the way we found our way home has been using the stars. The tech we have sent towards those stars also uses ...

Kuiper Belt Object Arrokoth, the farthest object ever explored by a spacecraft, likely tastes sweet — and soapy.

Arrokoth’s volume is now estimated to be 30% larger than previously thought. Today New Horizons is more than 315 million miles beyond Arrokoth and zooming outward through the Kuiper Belt, ...

The trans-Neptunian object Arrokoth, also known as Ultima Thule, which NASA's space probe New Horizons passed on New Year's Day 2019, may have changed its shape significantly in the first 100 ...

Arrokoth's surface is coated by a layer of frozen methanol, the kind of alcohol that makes humans go blind, as well as organic compounds responsible for its red colour.

Arrokoth is a planetesimal in the Kuiper Belt, a vast stretch of space beyond Neptune that holds remnant building blocks of the solar system leftover from our cosmic neighborhood's formation.