If you take a lot of digital pictures, you're probably familiar with the frustration of keeping track of dozens of files, and always running out of hard drive space to store them. Well, the scientists and engineers on NASA's Wide-field Infrared Survey Explorer (WISE) mission have no pity for you. Their spacecraft just finished photographing the entire sky in exquisite detail: a total of 1.3 million photos.
They are still making discoveries from the IRAS data from 1983. WISE is much more sensitive and will provide astronomers with research material for decades to come. That picture of the Pleiades is the best I've seen.
The Pleiades is beautiful, even when seen with just a pair of binoculars.