Galatea

NASA has selected four Discovery Program investigations to develop concept studies for new missions.

The Voyager imaging team asked for the photo to show Earth’s vulnerability — to illustrate how small, fragile and irreplaceable it is on a cosmic scale.

Naiad and Thalassa race around the ice giant in odd orbits seemingly to avoid each other.

Humanity's first and (so far) last visit to the outermost giant planet in our solar system was a monumental event for scientists and the public alike.

Our solar system is a stormy place. Join us on a tour of storms.

The next-generation radiometer is being developed to study the atmospheres of Uranus or Neptune, but could be used to study any atmosphere.

Long-term observations of Neptune have allowed scientists observe storm formation and also to track storm evolution on the ice giant.

Whether you're doing it for the nerd cred or the pie, this week on #10Things, we've got all the ways you can celebrate #PiDay with NASA.

Meet the women leading two of humankind's two most distant space missions.

Scientists may have an explanation for a mysterious moon around Neptune that they discovered with Hubble in 2013.

Hubble uncovered a new dark storm on Neptune and provided a fresh look at a long-lived storm on Uranus.

Quite a few candles have been lit since NASA was born on Oct. 1, 1958. Here’s a quick look back at some highlights from six decades of exploration—and a glimpse of what’s ahead.

Legendary explorers and visionaries, real and fictitious, are among those immortalized in the first set of official surface-feature names for Pluto's largest moon, Charon.

We're talking about the ice giants. These are two enormous planets in our outer solar system: Uranus and Neptune.

It's never too late to appreciate the far-reaching influence the Voyagers have had—including pop culture.

Ten things to know about Voyager 2 on the 40th anniversary of its launch.

August 25, 1989: Neptune is in view. It is the middle of the night and everything is happening fast at NASA's Jet Propulsion Laboratory in Pasadena, California.

In a flurry of new moon discoveries in late 2000 and early 2001, it was announced by this author - and several other sources - that the planet Uranus had 21 moons.

Dr. Stone, JPL's director since 1991, is stepping down on May 1.

What do you get if you mix together one part helium and five-and-a-half parts hydrogen, add a dash of methane, heat to 60 Kelvins (-351 degrees F) and let sit for over four billion years?