Presentation on theme: "ESAs Cosmic Vision David Southwood Director of Science and Robotic Exploration European Space Agency Paris, France 16 January 2009 International Year of."— Presentation transcript:
ESAs Cosmic Vision David Southwood Director of Science and Robotic Exploration European Space Agency Paris, France 16 January 2009 International Year of Astronomy Inauguration UNESCO, Paris, France
Deep space astronomical observatories
Que veulent dire les petits chuchotements qui restent du Big Bang? COBE WMAP Planck
The formation of stars
Gaia: a 3-D mapping of our galaxy
GAIA is going to detect and track : 10 9 (one billion) stars 10 6 – 10 7 resolved galaxies brown dwarfs extrasolar planets 200 gravitational lenses 10 7 resolved binaries 20 × 10 6 variable stars Tests of General Relativity and… – 10 6 solar system objects The numbers…..
The GAIA data challenge Over the nominal mission lifetime of five years, Gaias payload will yield a total uncompressed data volume of around 100 terabytes. The satellite will have contact with the ground station once a day for a mean duration of 11 hours, during which an uncompressed data volume of roughly 50 gigabytes will be down-linked at a rate of a few megabits per second.