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SUMMARY:Gaia - the mission and first science - Gerry Gilmore (IoA)
DTSTART:20171005T150000Z
DTEND:20171005T160000Z
UID:TALK86281@talks.cam.ac.uk
CONTACT:Richard McMahon
DESCRIPTION:Astrometry from space has unique advantages over ground-based 
 observations: the all-sky coverage\, relatively stable and temperature- an
 d gravity-invariant operating environment delivers precision\, accuracy an
 d sample volume several orders of magnitude greater than ground-based resu
 lts. Even more importantly\, absolute astrometry is possible. The European
  Space Agency Cornerstone mission Gaia is delivering that promise. Gaia pr
 ovides 5-D phase space measurements\, 3 spatial coordinates and  two space
  motions in the plane of the sky\,  for a representative sample of the Mil
 ky Way’s stellar populations (over 2e9 stars\, being ~1% of the stars ov
 er 50% of the volume). Full 6-D phase space data is delivered from line-of
 -sight (radial) velocities for the 300 million brightest stars. These data
  make substantial contributions to astrophysics and fundamental physics on
  scales from the Solar System to cosmology. A few example results will be 
 given.
LOCATION:Sackler Lecture Theatre\, IoA (tea at 3:30 pm)
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