Radar Mapping Titan

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...

Filters, pixels and math star in this narrated cartoon.

Seeking August 2020 skywatching highlights? The Moon poses with the planets, and the Perseid meteors peak!

How can you communicate with Mars spacecraft when the Sun is in the way? Learn more about 'solar conjunction' in this 60-second video.

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

Clara, Sugar Plum Fairy, move aside. Saturn's moons give Tchaikovsky's classic ballet, "The Nutcracker," a graceful new spin in this video compiled from some 61 images taken by the Cassini spacecra...

Team members reflect on what has made the NASA/ESA Cassini mission such an epic journey—the extraordinary spacecraft, tremendous science and historic international collaboration.

Classic video explaining the history, debate and continuing discussion of the definition of a planet.

This animated movie shows the simulated solar wind velocity from March 21 to May 10, 2013. 

NASA Chemist Sabah Bux describes the second potential target for Scientist for a Day contestants: Neptune's moon Triton.

Hello from Saturn, essentially on the opposite side of the sun as seen from Earth! This annual occurrence called solar conjunction, when Saturn (and Cassini) nearly disappear behind the sun.

Engineers at NASA's Jet Propulsion Laboratory in Pasadena, California, awaited the final transmission from the Cassini spacecraft as it plunged into Saturn's atmosphere ending its 20-year voyage of...

A harvest moon and a blue moon, Mars is up all night, and a journey beyond the galaxy.

In this movie, strung together from a series of images provided by the framing camera on NASA's Dawn spacecraft, we see a full rotation of Vesta, which occurs over the course of roughly five hours. 

Mating of LVA

Sunsets in July come with an added bonus: a brilliant gem low in the western sky, calling to us to come and explore its many mysteries. This is Venus – our nearest planetary neighbor.

Eleven years in the life of the Sun, spanning most of solar cycle 23.

One of the Hubble Space Telescope’s most iconic images is the Hubble Ultra Deep Field, which unveiled myriad galaxies across the universe, stretching back to within a few hundred million years of t...

Lloyd French talks about the adventures that await in science and in life.

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

What can you see in the October sky? Join the global celebration of International Observe the Moon Night on Oct. 5th, then try to catch the ice giant planets Uranus and Neptune.

Learn why NASA studies volcanoes and how volcanoes on Earth can teach us about volcanoes on other worlds in our solar system.

Mark Hofstadter describes the lure of science -- of discovering something new -- and his path to becoming a planetary scientist.

This movie shows clouds in the mid-southern latitudes of Saturn's largest moon, Titan, in a series of images captured by NASA's Cassini spacecraft a few months after fall began in the southern hemi...

Welcome to the Scientist for a Day 2018-2019 essay contest.