Video: Reflections on Clyde Tombaugh

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

Mating of LVA

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

A new video from NASA's Dawn spacecraft takes us on a flyover journey above the surface of the giant asteroid Vesta.

This artist's concept shows "tides" on Titan raised by Saturn's gravity, as detected by NASA's Cassini spacecraft.

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 ...

NASA's twin GRAIL spacecraft have new names, thanks to some enthusiastic 4th graders from Montana, who reveal the names in dramatic fashion.

This short computer-animated film highlights Cassini's accomplishments and Saturn and reveals the science-packed final orbits between April and September 2017.

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

Look up to the night sky just before dawn, or after dusk, and you might see a faint column of light extending up from the horizon. That luminous glow is the zodiacal light, or sunlight reflected to...

This three-frame animation from NASA's Cassini spacecraft shows the swirling clouds in a vortex spawned by a great northern storm on Saturn. The clouds are moving in a clockwise direction.

Hello, my name is Janelle. I think the best topic is number 2, Titan.

Phillip Chamberlin expresses his enthusiasm for science and describes how he became a research astrophysicist.

This is a computer simulation of the final stage of the growth of a "clump" in Saturn's rings.

This colorful spectrogram represents data collected by Cassini's Radio and Plasma Wave Science instrument as it crossed through Saturn's D ring on May 28, 2017.

At the end of the last Apollo 15 moon walk, Commander David Scott (pictured above) performed a live demonstration for the television cameras.

Have burning questions about asteroids? Our experts have answers! (Spoiler Alert: none of them will hit Earth.) Our solar system is littered with asteroids and comets and sometimes they get a littl...

The history-making Viking 1 mission launched 35 years ago.

Explore Earth's magnetic 'dent'

This animation shows "beacons" of hot air seen in the infrared that appeared during a great springtime storm on Saturn from January 2011 to March 2012. 

In the 1970s four spacecraft began their one-way trips out of our Solar System. NASA chose to place plaques on Pioneer 10 and 11 and golden records on Voyager 1 and 2 spacecraft. Continuing this le...

Two crescent moons dance around Saturn as far-off Dione slips behind its sibling moon Rhea.

Dawn spacecraft successfully launched September 27th, 2007.

In this movie from NASA's Cassini spacecraft, the gravitational pull of Saturn's moon Prometheus creates patterns in Saturn's F ring.

Studying Venus not only teaches us about our own planet, but also about many planets beyond our solar system.