Sweet! Wikipedia's image for Physical Cosmology, including your Dark Energy link, is the cosmic microwave background map from the WMAP mission. That was the first mission I worked with NASA. My job, as junior-underling attitude control engineer, was to come up with some way to salvage the medium cost, medium-risk mission if a certain part failed, and to help babysit the spacecraft during the least fun midnight-to-noon shift. Still, it feels good to have been a tiny part of something that has made a difference in how we understand our universe.

Disclaimer: My unofficial opinions, not NASA's. Blah, blah, blah.