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Wilkinson Microwave Anisotropy Probe

NASA's Wilkinson Microwave Anisotropy Probe measured minute temperature and polarization variations across the cosmic microwave background. Operating near the Sun–Earth L2 point, the observatory produced full-sky maps that enabled precise estimates of the universe's age, geometry, and composition.

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Identity

Aliases
WMAPMicrowave Anisotropy ProbeMAP
Name
Wilkinson Microwave Anisotropy Probe
Slug
wilkinson-microwave-anisotropy-probe
Status
completed

Details

Astronauts
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Description
NASA's Wilkinson Microwave Anisotropy Probe measured minute temperature and polarization variations across the cosmic microwave background. Operating near the Sun–Earth L2 point, the observatory produced full-sky maps that enabled precise estimates of the universe's age, geometry, and composition.
End Date
2010-08-19
Launch Site
Outcome
WMAP completed nine years of observations and transformed precision cosmology. Its measurements tightly constrained the universe's age, spatial geometry, and proportions of ordinary matter, dark matter, and dark energy.
Program
Medium-Class Explorers
Start Date
2001-06-30
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Creation Time
July 18, 2026 at 14:24:01 UTC
Updated Time
July 18, 2026 at 14:24:01 UTC

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