Assuming you’ve accepted Pluto’s demotion, Uranus and Neptune are the two planets in our Solar System farthest from Earth. That distance means humanity is still learning a lot about them. Some of ...

Lying at the very outskirts of our solar system, the ice giant Neptune has long represented both a challenge and a mystery to astronomers and space explorers alike. The dark and cold planet, the ...

To pull off this moonwalk, you’ll have to travel about 3 billion miles! Hippocamp, the recently discovered 14th moon of Neptune is — in astronomic terms — teeny, with a diameter of just 21 miles, but ...

When Voyager II flew past Neptune in August of 1989 it revealed a complex system of 13 moons, six of which had never been seen before. Thirty years later, scientists say the space probe missed one.

Introducing Hippocamp—the smallest of Neptune’s seven inner moons. The recently discovered moon likely formed from a collision with another moon billions of years ago. New research published today in ...

CAPE CANAVERAL, Fla. (AP) - Neptune's newest and tiniest moon is probably an ancient piece of a much larger moon orbiting unusually close. In the journal Nature on Wednesday, California astronomers ...

We're all made of star stuff, but some things in the universe are created by comets. Neptune's recently discovered and smallest moon, Hippocamp, has been confirmed and observed in detail by the Hubble ...

The planets may get top billing in the solar system, but they are far outnumbered by the moons. There are hundreds, and they come in all kinds of varieties, like a cosmic tray of assorted chocolates.

Further evidence that a giant moon the size of Neptune is orbiting a Jupiter-sized planet 4000 light-years away has been put forth by astronomers using the Hubble Space Telescope. Such events are ...

Our solar system has a few new entries with the recent discovery of three moons of Uranus and Neptune. These ice giant planets are so far away that it is difficult to detect small moons orbiting them, ...

A diminutive nugget of a moon has been discovered lurking in the inner orbit of Neptune. The moon, dubbed Hippocamp for the half-horse, half-fish sea monster from Greek legend, is about the size of ...