description Planck Observatory Overview
The Planck Observatory was a European Space Agency satellite launched in 2009. It meticulously measured microwave radiation from across the cosmos, specifically studying the cosmic microwave background. This data provided the most precise measurements yet of the early universe’s age approximately 13.8 billion years, its shape, and the proportions of different elements within it. Scientists using Planck's findings include cosmologists and astrophysicists investigating the origins and evolution of our universe.
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Planck Observatory ranks #4 of 279 in the Observatory ranking, behind Royal Greenwich Observatory, ahead of Samarkand Observatory of Ulugh Beg.
Landmark CMB mission with definitive cosmological measurements and exceptional citation impact; top-tier space observatory legacy.
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What did the Planck Observatory measure?
Planck mapped tiny temperature and polarization variations in the cosmic microwave background. That radiation is a remnant from the early universe and carries information about its composition, geometry, and development.
Where did the Planck spacecraft operate?
The European Space Agency sent Planck to an orbit around the Sun-Earth L2 region, about 1.5 million kilometers from Earth. That location provided a stable thermal environment and an unobstructed view of the sky.
How was Planck different from WMAP?
NASA's WMAP and ESA's Planck both mapped the cosmic microwave background, but Planck observed more frequency bands and achieved finer angular resolution. Its instruments also improved the separation of the ancient signal from dust and other foreground emissions.
Why did the Planck mission end?
Planck exhausted the coolant needed for its High Frequency Instrument before completing later work with its remaining systems. ESA deactivated the spacecraft in 2013 after its planned observing mission and final engineering operations.
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