Saturday, July 12, 2025
84.0°F

Dwarf planet Ceres gets ready for spotlight

The Associated Press | Hagadone News Network | UPDATED 10 years, 4 months AGO
by The Associated Press
| March 5, 2015 7:10 PM

LOS ANGELES (AP) — The mysterious dwarf planet Ceres is ready for its close-up.

Located in the asteroid belt between Mars and Jupiter, Ceres is the largest unexplored space rock in the inner solar system. That distinction ends today, when NASA’s Dawn spacecraft arrives after nearly an eight-year journey, which included a stopover at the asteroid Vesta.

Dawn has already beamed back images of Ceres from its approach. 

THE DISCOVERY

Ceres was spotted on New Year’s Day in 1801 by Italian monk and astronomer Giuseppe Piazzi who was searching for a star. It was the first object discovered in the asteroid belt, a zone littered with rocky debris left over from the formation of the sun and planets 4 1/2 billion years ago.

THE NAME

Piazzi named the object “Ceres Ferdinandea” after the Roman goddess of harvest and in honor of King Ferdinand IV of Naples and Sicily. Other astronomers shortened it to Ceres. The word cereal also has its origins in Ceres. The chemical element cerium, discovered in 1803, was named after Ceres. 

THE IDENTITY CRISIS 

Located about 250 million miles from the sun, Ceres was deemed a comet when it was first discovered. Then it was promoted to a planet and later downgraded to an asteroid. Since 2006, it has been classified as a dwarf planet like Pluto, the one-time ninth planet.  

THE BRIGHT SPOTS

Ceres — with a diameter of about 600 miles — is thought to have a rocky core surrounded by an icy mantle. Long ago it might have harbored an underground ocean. As Dawn approached Ceres, it spotted a pair of puzzling bright spots inside a crater. Scientists think the shiny dots may be exposed ice or salt. 

THE MISSION

Launched in 2007 and powered by ion propulsion engines, Dawn will make the first close-ups of a dwarf planet. It will study Ceres for 16 months from varying altitudes, getting as close as 235 miles above Ceres’ surface, or the distance of the International Space Station above Earth. 

The spacecraft will take sharper images of the mysterious spots and use its instruments to confirm whether Ceres’ surface is still active and spewing plumes of water vapor.

This summer, another NASA spacecraft dubbed New Horizons will make the first visit to the dwarf planet Pluto.

MORE IMPORTED STORIES

NASA spaceship to make first visit to dwarf planet
Coeur d'Alene Press | Updated 10 years, 4 months ago
NASA spacecraft closing in on Pluto Smile for the camera!
Daily Inter-Lake | Updated 10 years, 5 months ago
Pluto up close, at last
Coeur d'Alene Press | Updated 9 years, 12 months ago

ARTICLES BY THE ASSOCIATED PRESS

September 9, 2021 12:03 a.m.

The Latest: US helped family escape Afghanistan overland

WASHINGTON — The United States is confirming for the first time that it has helped a U.S. citizen and family members to escape Afghanistan through an overland route to a neighboring country.

September 8, 2021 12:03 a.m.

The Latest: US helped family escape Afghanistan overland

WASHINGTON — The United States is confirming for the first time that it has helped a U.S. citizen and family members to escape Afghanistan through an overland route to a neighboring country.

September 8, 2021 12:03 a.m.

The Latest: Top Republican says Taliban holding Americans

WASHINGTON — The top Republican on the House Foreign Affairs Committee says some Americans who have been trying to get out of Afghanistan since the U.S. military left are sitting in airplanes at an airport ready to leave but the Taliban are not letting them take off.