Herschel and Planck: the ESA looks for the early years of the Universe14 May 2009
Just over 3 hours from the time I write this, the European Space Agency will launch two satellites. Both will study the early stages of the universe. Watch it live at this link, or follow them on Twitter.
What will they do?
- Herschel will carry an infrared telescope. That means it won’t capture visual-spectrum images like Hubble has. What it will catch, in frequencies and detail never before achieved, is information about early star and planet formation. Because its sensitivity is so high, and because radiated heat is infrared, the satellite has an elaborate cryogenic system to keep it super-cool.
- Planck won’t take visual images either: it’ll measure, in great detail, the Cosmic Microwave Background radiation (that is, the radiation left over from just after the Big Bang).
Each will do lots of other things, too. Read the links.
Image from ESA.