Pluto may have been demoted to non-planet status, but it still commands a court of five moons, as is fitting for the king of ...

In Roman mythology, Pluto is the god and ruler of the dead. For a return mission to the dwarf planet, Howett and her ...

When 1I/'Oumuamua was first spotted in 2017, astronomers quickly determined that it came from outside the solar system. But ...

"The profile of the occultation was most consistent with it being a new satellite — a new moon — going around Quaoar." ...

Federal funding is about to run out for 19 active space missions studying Earth's climate, exploring the Solar System, and probing mysteries of the Universe.

Pluto, once considered the ninth planet, lies over 6 billion kilometers from Earth, making it one of the most difficult ...

NASA's New Horizons probe flew closer to Pluto than any Earth-craft ever has Tuesday, sending back amazing photos of the dwarf planet. Photos of Pluto leading up to the New Horizons flyby Before June ...

Finally, a family portrait of Pluto is beginning to emerge! For the first time ever, astronomers have captured two never-before-photographed moons orbiting Pluto. NASA's New Horizons spacecraft ...

On July 14, 2015, NASA's New Horizons spacecraft arrived at Pluto for the first time. The craft flew within 7,700 miles of the planet and is sending back reams of data and the highest resolution ...

The New Horizons spacecraft sends back its sensational snapshots of Jupiter, and its volcanic moon Io, before the mission's close encounter with Pluto (Photo by: Photo12/Universal Images Group via ...

It may look a little blurry, but the bright orange-tinted circle in the middle of the photo above is the first color image of Pluto and its largest moon, Charon. The image was taken by the Ralph color ...