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 ...

Neptune has a new moon, and it’s also the gas giant’s smallest to date — only a little over 20 miles across. The brand new satellite is called Hippocamp. Astronomers led by Mark Showalter of the SETI ...

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 ...

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 ...

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 ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Nearly eight thousand light-years away from Earth, there’s a star ...

For the first time in decades, a new tiny moon has been found in orbit around the gas giant Neptune, according to a study published Wednesday in the journal Nature. Hippocamp, now known as Neptune's ...