Many moons ago⁣ ⁣ Saturn's icy moon Rhea passes in front of Titan as seen by NASA's Cassini spacecraft. Some of the differences between the two large moons are readily apparent. While Rhea is a heavily-cratered, airless world, Titan's nitrogen-rich atmosphere is even thicker than Earth's. This natural color image was taken in visible light with the Cassini narrow-angle camera on Nov. 19, 2009, at a distance of approximately 713,300 miles (1,148,000 kilometers) from Rhea. The Cassini spacecraft ended its mission on Sept. 15, 2017.⁣ ⁣ Image Description:⁣ Saturn's icy moon Rhea passes in front of larger moon Titan. Both appear as dramatic crescents lit by sunlight from the left of frame. Smaller Rhea is heavily-cratered and gray, while Titan's tawny haze glows.⁣ ⁣ Credit: NASA/JPL-Caltech/Space Science Institute⁣ ⁣ #NASA #NASAJPL #Cassini #Space #Solarsystem #Saturn #Rhea #moons