“Planck Mission: Revealing the early stage of the Universe”

I will present the recent results of the Planck satellite mission, by
introducing first of what consists the CMB science. I will then reveal what we
learned from Planck about our Universe: his age, his history, his content. I
will then focus on what has been learned thanks to the polarization
information provided by Planck, especially concerning the importance of the
Galactic foregrounds when searching for gravitational wave’s signatures into
the CMB maps.

“The Planck Catalogue of Galactic Cold Clumps”

We have combined the Planck-HFI and IRAS maps to perform an all-sky detection
of the cold submillimetre Galactic sources over the whole sky, to build the
The Planck Catalogue of Galactic Cold Clumps, counting 13188 sources. I will
describe how we proceed to build this catalogue using an original
multi-frequency detection method, and how we characterized this population of
objects using new distance estimates for one third of them. I will finally
discuss the results provided by the Herschel Galactic Cold Core follow-up Key
Programme of about 350 PGCC sources, yieldings important clues about the early
phases of the star-formation.