NASA’s Cassini spacecraft is headed toward its Sept. 15 plunge into Saturn, following a final, distant flyby of the planet’s giant moon Titan. The spacecraft made its closest approach to Titan today ...

In 2008, NASA’s now-departed Cassini spacecraft made its fastest flyby of Enceladus, the moon of Saturn that’s spewing its subsurface ocean into space. A new analysis of data from that flyby has ...