
Oh, my sweet M31: so close, yet so far.
To back up for a second... That's a total-sky survey that the WISE team is planning to complete in six months. That alone is cool. The W in WISE stands for Wide-field. According to the mission website, each photo snapped by WISE covers an area of the sky equal to the area of three full moons. If that doesn't sound huge to you, consider the way astronomer Phil Plait, once who worked with Hubble, put it: "Hubble could take picture after picture for weeks and not get a view of the sky as large as WISE does in a few minutes," adding, "of course, the Hubble image would be a whole lot more detailed."
So far, WISE has discovered a comet and a near-Earth asteriod and has been just generally really cool.
... about as cool as the Hubble Space Telescope continues to be.
Image credit: NASA/JPL-Caltech/UCLA