Distant starlight has given astronomers the best look yet at a distant icy sibling of Pluto, a dwarf planet called Makemake that appears to be missing its atmosphere, researchers say.Although this ...

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

To put it in context, Pluto, which is the most famous dwarf planet, is roughly 1,491 miles in diameter. Hygiea would be the smallest dwarf planet with a rotation rate of around 13.8 hours.

The dwarf planet's red-tinged surface is apparently covered by a layer of frozen methane, and is bright enough to be seen by a high-end amateur telescope, despite its current distance of nearly 53 ...

Pluto was once thought to be as big as the Earth. It was regarded as a full-fledged planet for three-quarters of a century, only to be demoted to a new category, "dwarf planet," in 2006. Pluto was ...

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

This image sent July 13, 2015, from the New Horizons spacecraft shows the best-ever view of Pluto. A few days later, scientists said the dwarf planet has large frozen plains in its heart-shaped ...

Pluto's status has been a heated debate for decades with arguing over a dwarf planet classification. Here's what international standards say in 2023. Hotspots ranked Start the day smarter ☀️ ...

Ceres has some similarities with the other dwarf planets, such as Pluto and Eris. It is rubble left over from the formation of the solar system — a protoplanet that was stillborn and never grew ...

In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One year on the distant ice planet is 248 Earth years, and one day is 153 ...

Pluto and its largest moon, Charon, are seen from the surface of one of the dwarf planet's smaller moons. Illustration courtesy G. Bacon, STScI/ESA/NASA New Finds Drive Debate ...