At 5 am ET on Wednesday, NASA will fly its $3.26 billion Cassini spacecraft where no spacecraft has flown before — in the deepest region of Saturn's rings between the planet and its inner-most ring.

In two days time, NASA's Cassini will reach the last stage of its Grand Finale when it enters Saturn's atmosphere. Leading up to this moment, Cassini has been approaching the planet closer than it ...

On April 26, the Cassini spacecraft flew closer to Saturn than ever before — between the gap that separates the planet from its rings. Since then, Cassini has been transmitting dozens of images ...

Twenty years ago, a rocket launched from Cape Canaveral in Florida on a billion mile trek to Saturn. The photos the probe took revealed some astonishing things about Saturn, its rings and moons.