When you buy through links on our articles, Future and its syndication partners may earn a commission. An illustration of confirmed dwarf planets and their moons. From left to right: Pluto (with ...

LOS ANGELES (AP) — After a nearly eight-year journey, a NASA spacecraft on Friday flawlessly slipped into orbit around Ceres in the first visit to a dwarf planet. The robotic Dawn craft will circle ...

On January 1, 1801, a Sicilian astronomer named Giuseppe Piazzi discovered the dwarf planet Ceres orbiting the sun between Mars and Jupiter. At the time, Ceres was considered to be a planet. But after ...

Ceres is rich with water, the Dawn spacecraft finds. What can this mean for finding life on other worlds? Ceres is the largest dwarf planet in the inner solar system, and new findings from the Dawn ...

On January 5, 2005, astronomers at NASA discovered Eris, the second-largest dwarf planet in the solar system. Eris is just ...

Pluto's days, though they drag on a bit at around 153 hours, are nothing compared to its years. Pluto's orbit takes 248 Earth ...

A color-enhanced view of Ceres, the nearest dwarf planet to Earth, high­lights its Oc­ca­tor crater. Credit: NASA / JPL-Caltech / UCLA / MPS / DLR / IDA Pluto is the most famous dwarf planet, due in ...

A new color movie combines more than 100 images taken by NASA's New Horizons spacecraft during the probe's historic Pluto flyby in the summer of 2015. The dwarf planet Ceres still holds pockets of ice ...

In this except from "Space Camp," a special series from NPR science podcast Short Wave, host Regina Barber delves into Pluto's demotion from planet to dwarf planet. It's not exactly news to say that ...

Pluto, once considered the ninth planet, was reclassified as a dwarf planet in 2006 because it shares its orbital path with ...

Eighteen years ago today, Pluto lost its planetary status in a vote by International Astronomical Union (IAU) members on the final day of their 2006 general assembly meeting. The word "planet" comes ...

Pluto, the most famous dwarf planet, lost its planet status in 2006. Learn more about dwarf planets of the solar system here. NASA's Dawn spacecraft has been granted a mission extension that will ...