One instrument on this craft was adapted for use in the Archeops mission, which was used to prototype part of the cryogenic chain cooling system of this craft. This instrument was the first to get a full-sky Sunyaev-Zeldovich catalogue of galaxy clusters. This instrument was launched with a common service module as the Herschel observatory. Originally called COBRAS/SAMBA, this satellite has a low-frequency instrument and a high-frequency instrument, and takes measurements across nine bands. This experiment confirmed the existence of a hemispheric power asymmetry at a (*) multipole moment up to 1500, as well as a previously-characterized cold 
One instrument on this craft was adapted for use in the Archeops mission, which was used to prototype part of the cryogenic chain cooling system of this craft. This instrument was the first to get a full-sky Sunyaev-Zeldovich catalogue of galaxy clusters. This instrument was launched with a common service module as the Herschel observatory. Originally called COBRAS/SAMBA, this satellite has a low-frequency instrument and a high-frequency instrument, and takes measurements across nine bands. This experiment confirmed the existence of a hemispheric power asymmetry at a (*) multipole moment up to 1500, as well as a previously-characterized cold spot. This satellite constrains the amount of dark energy down to 68.3% of the overall mass of the universe. This experiment has a resolution of around 10 arc-minutes, which is around three times better than its predecessor, WMAP. For 10 points, name this ESA satellite that mapped anisotropies in the cosmic microwave background, named for a German physicist.
One instrument on this craft was adapted for use in the Archeops mission, which was used to prototype part of the cryogenic chain cooling system of this craft.
Planck satellite