The Planck satellite, to be launched in 2008, is designed for
measuring CMB temperature and polarization anisotropies with much
better precision than the -already impressive- WMAP experiment. In
this seminar, I will present the expected sensitivity of Planck to
the parameters describing dark matter, dark energy, inflation, relic
neutrinos, etc., which are also of great interest for particle
physics. I will show how this sensitivity will increase, first, by
performing a weak lensing analysis of the raw temperature map, and
second, by combining Planck data with future large scale structure
surveys.