The two planets will merge in the night sky Monday, appearing closer to one another than they have since Galileo’s time in the 17th century.
Mars, Jupiter, Saturn and a crescent moon will be clustered together in the southeastern sky just before daybreak. Mercury will peek above the horizon.
After 20 years and many moons, the Cassini spacecraft was sent crashing into Saturn.
The spacecraft completely changed our view of Saturn and her moons.
Scientists confront new mysteries about the largest planet in our solar system.