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 ...

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.

This illustration shows NASA's Cassini spacecraft about to make one of its dives between Saturn and its innermost rings as part of the mission's grand finale. All ...