Voyage of Discovery

NASA's Cassini has found salt in Saturn's E ring, hinting that the moon Enceladus could have an underground liquid reservoir, perhaps even an ocean.

NASA's Dawn is the first spacecraft to orbit two extraterrestrial targets.

The bright crescent of Saturn's moon Enceladus slides past distant Rhea in this mutual event, or occultation, movie from Cassini.

Credit: NASA Goddard Space Flight Center

This video from NASA's Dawn mission shows that the gravity field of Vesta closely matches the surface topography of the giant asteroid Vesta.

Animation of Cassini's final orbit, leading to a pass by the moon Titan which sends the spacecraft plunging into Saturn on Sept. 15, 2017. 

Keeping a close watch on the outer portion of Saturn's B ring, NASA's Cassini spacecraft records the complex inward and outward movement of the edge of the ring.

In this month's sky, look for lovely crescent Moons at the start and end of the month. The September equinox brings the beginning of fall in the Northern Hemisphere. And Mars is at solar conjunctio...

This simulated voyage over the surface of Neptune's large moon Triton was produced using topographic maps derived from images acquired by NASA's Voyager spacecraft during its August 1989 flyby, 20 ...

A short film from 1969 showing Ranger 9 images as it approached the Moon.

Jets of icy particles burst from Saturn's moon Enceladus in this brief movie sequence of four images taken on Nov. 27, 2005.

This is a compilation of the Saturn hexagon movies released on Dec. 5, 2013.

Jupiter Magnetosphere

After a 15-year wait, equinox arrived at Saturn and Cassini was there to witness the spectacle of light and shadow.

Mating of LVA

This view from NASA's Cassini mission is the highest-resolution view of the unique six-sided jet stream at Saturn's north pole known as "the hexagon."

With kaleidoscopic forms and hues, these two false-color views from NASA's Cassini spacecraft show the patterns that come and go in the course of one Saturn day within the huge storm in the planet'...

The moon Prometheus slowly collides with the diffuse inner edge of Saturn's F ring in this movie sequence of Cassini images.

Hi, Everyone! My name's Morgan. My favorite topic is Enceladus.

This computer-generated animation shows all of Cassini's orbits - affectionaly called the "ball of yarn" by mission planners.

NASA's Cassini spacecraft has spotted a glowing patch of ultraviolet light near Saturn's north pole that marks the presence of an electrical circuit that connects Saturn with its moon Enceladus.

The Sun emitted a significant solar flare on Dec. 19, 2014.  

Scientists working with NASA's Dawn spacecraft have created a new video showing the giant asteroid Vesta as the spacecraft approaches this unexplored world in the main asteroid belt.

Blanket Installation

We know what the Red Planet looks like from the outside – but what's going on under the surface of Mars?