"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.