Uranus isn't interested in catching our attention. There's no denying it. While all the planets orbiting the sun closer than this tilted blue giant have been known to humans since ancient times, Uranus wasn't spotted until William Herschel saw it in 1781. Its rings remained unknown until 1977. And only once every 42 years, half its 84-year orbit, are the rings tilted on edge toward the Earth.

That happened in August 2007, and Hubble was there to catch a glimpse.