Figuring out the day length of Earth is more complicated than you might imagine. While on average a day is 24 hours long, ...

Illustration of Cassini diving between Saturn and its innermost rings as part of the mission's Grand Finale. The spacecraft will perform a series of 22 daring orbits passing through the yet ...

Cassini Spacecraft's Last Chapter Ended With a Suicidal Plunge Into Saturn Spacecraft remain the best lens with which humans ...

NASA’s Cassini spacecraft has successfully executed its daring dive, hurtling through the 1,500-mile-wide gap between Saturn and its rings.

When the movie begins, Cassini was 45,000 miles above Saturn's polar clouds. By the time it ends, the spacecraft's altitude was down to 4,200 miles as it approached the plane of the rings.

Cassini will be taking direct samples of ring particles, as well as samples of Saturn’s innermost radiation belts and upper atmosphere. A second dive between Saturn and its rings is scheduled ...

NASA's Cassini spacecraft captured this series of 21 images from within the gap between Saturn and its rings. (NASA/JPL-Caltech/Space Science Institute) ...

Saturn’s iconic icy rings may not be around for future skygazers to glimpse at through their telescopes, according to new research. A new analysis of data captured by NASA’s Cassini mission ...

NASA’s Cassini spacecraft will shift its orbit around Saturn on Saturday, preparing to dive between the planet and its many rings. After 13 years in orbit, Cassini is set to burn up in Saturn ...

Measuring ring-material detected by Cassini falling into Saturn’s equator allowed astronomers to give the rings another 100 million years to live. This story has been updated to fix a typo.

Illustration of Cassini diving between Saturn and its innermost rings as part of the mission's Grand Finale. The spacecraft will perform a series of 22 daring orbits passing through the yet ...

Cassini looks back at Saturn after its second pass through the gap between the planet and its rings. May 2 Rhea Saturn’s moon Rhea is one of the most heavily cratered objects in the solar system.