  The Cosmic Microwave Background Radiation is the oldest photon radiation that
can be observed, having been emitted when the Universe was about 300,000 year
old. It is a blackbody at 2.73 K, and is almost perfectly isotropic, the
anisotropies being about one part to 100,000. However, these anisotropies,
detected by the COBE satellite in 1992, constrain the cosmological parameters
such as the curvature of the Universe. Archeops is a balloon-borne experiment
designed to map these anisotropies. The instrument is composed of a 1.5 m
telescope and bolometers cooled at 85 mK to detect radiation between 150 and
550 GHz. To lower parasitic signals, the instrument is borne by a stratospheric
balloon during the arctic night. This instrument is also a preparation for the
Planck satellite mission, as its design is similar to HFI. We discuss here the
results of the first scientific flight from Esrange (near Kiruna, Sweden) to
Russia on January 29th 2001, which led to a 22 % (sub)millimetre sky coverage
unprecedented at this resolution. Here, we put some emphasis on interstellar
dust foreground emission observations.
