NASA’s Cassini spacecraft took these stunning photos of Saturn’s rings on December 18, 2016, while it was performing one of its ‘ring-grazing’ orbits. This Cassini image features a density wave in Saturn’s A ring (at left) that lies around 83,575 miles (134,500 km) from Saturn. Density waves are accumulations of particles at certain distances from the planet. This feature is filled with clumpy perturbations, which researchers informally...
