MAP Data Released!
11 Feb 2003 - The results from the first year of observing by the Wilkinson Microwave Anisotropy Probe were announced today at a Space Science Update in the auditorium of NASA HQ. Important results include:
- The satellite has been renamed in honor of the late David T. Wilkinson of Princeton University, a key member of the project from its conception.
- The polarization of the microwave background anisotropy coming from scattering by electrons 200 million years after the Big Bang has been detected. This is evidence for an early generation of stars existing 4 to 5 times earlier than any object yet observed.
- The WMAP data agree with previous work showing the Universe is flat and in an accelerating expansion.
- The WMAP data give the most precise values for the density of ordinary [baryonic] matter made of protons and neutrons: 0.4 yoctograms per cubic meter, and for the total of dark and baryonic matter: 2.5 yoctograms per cubic meter. These correspond to omega_b = 0.0224 +/- 0.0009 and omega_m = 0.135 +/- 0.009.
- The WMAP data give the most precise value for the age of the Universe: 13.7 +/- 0.2 Gyr. The Hubble constant is Ho = 71 +/- 4 km/sec/Mpc, and the vacuum energy density corresponds to lambda = 0.73 +/- 0.04.
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Unless the universe has something else going on we are doomed to the heat death. It will be a while, but it seems certain.