Two icy moons of Saturn
Saturn’s moons Tethys and Hyperion appear to be very close in this image taken from NASA’s Cassini spacecraft.
In reality, the moons are are actually 930,000 miles (1.5 million kilometers) apart. Tethys is the larger body on the left.
Tethys is a mid-sized moon at about 1,060 km (660 miles) across. It was discovered by G. D. Cassini in 1684 and is named after the titan Tethys of Greek mythology.
Hyperion is much smaller and features an irregular shape with an unexplained sponge-like appearance. Discovered by William Cranch Bond, George Phillips Bond and William Lassell in 1848, it was the first non-round moon to be discovered.
The image was captured at a distance of approximately 750,000 miles (1.2 million kilometers) from Tethys.