The Rings of Uranus - August 14, 2007
Nobody even knew Uranus had rings until 1977, when a team of American astronomers observed the planet as it passed in front of a star. Hubble’s photographs of Uranus’ rings contributed to our knowledge of how many exist, 13 as of 2008. In this image, the rings appear as two spikes above and below the planet. Earthbound astronomers see the rings' edge only every 42 years as the planet follows an 84-year orbit about the Sun.