Video: Reflections on Clyde Tombaugh

Cassini scientist Dr. Kevin Baines discusses Saturn's Cyclones.

This short animation created by Cassini's mission planning team shows how a Titan flyby will be used to move the spacecraft's course from orbiting Cassini's outer ring (F ring) to an orbit that tak...

These two false-color views from NASA's Cassini spacecraft show detailed patterns that change during one Saturn day within the huge storm in the planet's northern hemisphere.

For 13 years the spacecraft’s incredible, truly otherworldly images have revealed the wonder of Saturn in surprising, often awe-inspiring ways.

This movie shows a quick succession of multiple products of Titan's surface from the Cassini orbiter and the European Space Agency's Huygens probe.

This movie uses data from NASA's Dawn spacecraft to simulate the view from the spacecraft flying over the surface of the giant asteroid Vesta.

On March 6, the Dawn spacecraft will slip into orbit around Ceres, a dwarf planet located in the main asteroid belt.

As millions of people observed the total lunar eclipse on October 8, 2014, MESSENGER was also watching from Mercury.

The shadow of Saturn's moon Tethys seems to disappear as it crosses the planet's rings, demonstrating variations in the density of particles across the rings.

This image shows that NASA's Dawn mission detected abundances of hydrogen in a wide swath around the equator of the giant asteroid Vesta. The hydrogen probably exists in the form of hydroxyl or wat...

One of the glittering trails caused by small objects punching through Saturn's F ring is highlighted in this movie from NASA's Cassini spacecraft.

The geocentric phase, libration, position angle of the axis, and apparent diameter of the Moon throughout the year 2020.

What's Up for January? Morning meteors, Mars meets its "rival," and the Moon comes around for another visit with Venus.

Bennu's Journey is a 6-minute animated movie about NASA's OSIRIS-REx mission, asteroid Bennu, and the formation of our solar system.

Dr. Bonnie Buratti describes her background as well as her role as a senior research scientist.

The animation archived on this page shows the geocentric phase, libration, position angle of the axis, and apparent diameter of the Moon throughout the year 2017, at hourly intervals.

A mission concept to explore Jupiter's intriguing moon system.

This short animation created by Cassini's mission planning team shows the spacecraft's final orbits - starting with the Ring-Grazing orbits in November 2016 and transitioning to the Grand Finale or...

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

Giovanni Cassini, the astronomer, discovers a moon near Saturn. Half is dark as coal. The other half, bright as snow. Three centuries later, Cassini, the spacecraft, flies by for a close look.

Part of the shadow of Saturn's moon Mimas appears as if it has been woven through the planet's rings in this unusual series of images from Cassini.

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

The tumbling and irregularly shaped moon Hyperion rotates away from the Cassini spacecraft in this movie taken during a distant encounter in Dec. 2005.

Rotating asteroids have a tough time sticking to their orbits. Their surfaces heat up during the day and cool down at night, giving off radiation that can act as a sort of mini-thruster.

NASA's Dawn mission will be the first to explore a dwarf planet on March 6, 2015. This video details the spacecraft's approach and orbit insertion.