Dwarf planet
Asteroid Belt Object Twice the Size of the Grand Canyon Imaged
Astronomers created images of 42 objects, including dwarf planet Ceres and the main asteroid belt's largest bodies.
Hygiea: Enormous Asteroid Is Actually a Tiny Dwarf Planet, Scientists Say
Scientists say the Iowa-sized object in the asteroid belt has a surface composition similar to Ceres.
Massive Impact With Dwarf Planet Caused Differences Between Moon's Faces
Scientists have long been puzzled by the asymmetrical nature of the moon's two hemispheres.
Take a Simulated Tour of Dwarf Planet Ceres
NASA's Dawn spacecraft spent several weeks mapping Ceres from 900 miles up. Here's a simulated tour.
Evidence of New 'Planet Nine' Found in Solar System
The planet is believed to be 5,000 times the mass of Pluto.
First Scientific Paper Published on Pluto Flyby Is Just the Beginning
Just three months after the historic flyby, the New Horizons team has a paper coming out in the journal "Science."
Blue Skies and Water Ice: New Discoveries on Pluto
Program scientist Curt Niebur explains new data from NASA's New Horizons mission.
New Pluto Photos Reveal a Closer Look at the Dwarf Planet's Landscape
NASA has released an image taken by the New Horizons spacecraft just 15 minutes after its Pluto flyby.
New Image of Pluto Reveals Mountains but No Impact Craters Yet
One day after the flyby, the New Horizons team makes an important discovery about geology based on a detailed surface image.
Stephen Hawking, Google, Obama and Others Congratulate NASA on Pluto Flyby
Videos, tweets and a Google doodle honor the historic moment in space exploration.
Pluto's Best Portrait Yet Reveals Complex World, Surface Features
NASA published its most detailed image yet, taken one day before the flyby. Even better images are still to come.
Before the Pluto Flyby: What Has New Horizons Seen So Far?
From launch to the scheduled flyby on July 14, New Horizons has sent back images of Jupiter and its moon Io, Neptune, and now Pluto and its moon Charon.
NASA Releases Video of Flyby of Dwarf Planet Ceres
NASA released a new video simulating a fly by of Ceres, based on images taken by its Dawn spacecraft.
Spacecraft Reaches Dwarf Planet With Unexplained Bright Spots
A signal from NASA's Dawn confirming the first-ever successful entry into orbit of a dwarf planet came back at 8:36 a.m. on Friday.
The Case of the Mysterious Lights on Dwarf Planet Ceres
NASA "did not expect to be this puzzled" by the appearance of two reflective lights on the protoplanet.
