The planet Uranus is spectacularly far away. Even when viewed from Saturn, the next planet in, icy Uranus is still just a few pixels of blue in an inky black sky. This photo was taken by NASA’s Cassini spacecraft while the probe was 2,659,800,000 miles away from Uranus.

Here, Saturn’s A and F rings arc across the foreground. Uranus is in the upper left. With the equivalent of 14.5 Earth-masses of material, the planet is considered an ice giant (its neighbor Neptune is, too) since it’s primarily made of water, ammonia, and methane ices. It looks blue in photographs because the methane in its atmosphere absorbs red wavelengths and reflects blue.

Like Saturn, Uranus has rings and moons. But unlike Saturn —