“March 4, 2010. Saturn’s moon Dione dwarfs the moon Telesto in this Cassini spacecraft image. Dione (1123 kilometers, 698 miles across) is the fourth largest of Saturn’s moons, and it dominates this view. Tiny Telesto (25 kilometers, or 16 miles across) can be seen below and to the left of Dione. This view looks toward the anti-Saturn side of Dione. North on Dione is up. The image was taken in visible light with the Cassini spacecraft narrow-angle camera. The view was acquired at a distance of approximately 477,000 kilometers (296,000 miles) from Dione and at a Sun-Dione-spacecraft, or phase, angle of 72 degrees. Scale on Dione is 3 kilometers (2 miles) per pixel.”
“After almost 20 years in space, NASA’s Cassini spacecraft begins the final chapter of its remarkable story of exploration: its Grand Finale. Between April and September 2017, Cassini will undertake a daring set of orbits that is, in many ways, like a whole new mission. Following a final close flyby of Saturn’s moon Titan, Cassini will leap over the planet’s icy rings and begin a series of 22 weekly dives between the planet and the rings.
No other mission has ever explored this unique region. ...