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The Cosmic Microwave Background Radiation is the oldest photon radiation thatcan be observed, having been emitted when the Universe was about 300,000 yearold. It is a blackbody at 2.73 K, and is almost perfectly isotropic, theanisotropies being about one part to 100,000. However, these anisotropies,detected by the COBE satellite in 1992, constrain the cosmological parameterssuch as the curvature of the Universe. Archeops is a balloon-borne experimentdesigned to map these anisotropies. The instrument is composed of a 1.5 mtelescope and bolometers cooled at 85 mK to detect radiation between 150 and550 GHz. To lower parasitic signals, the instrument is borne by a stratosphericballoon during the arctic night. This instrument is also a preparation for thePlanck satellite mission, as its design is similar to HFI. We discuss here theresults of the first scientific flight from Esrange (near Kiruna, Sweden) toRussia on January 29th 2001, which led to a 22 % (sub)millimetre sky coverageunprecedented at this resolution. Here, we put some emphasis on interstellardust foreground emission observations.

Archeops: A CMB anisotropy balloon experiment measuring a broad range of angular scales