Which specific feature did the WMAP mission primarily map to determine cosmic geometry?
Answer
The temperature fluctuations in the Cosmic Microwave Background (CMB).
The Wilkinson Microwave Anisotropy Probe (WMAP) mapped the faint afterglow radiation from the early universe, specifically looking at the pattern of hot and cold spots in the CMB. The apparent size of these spots acts as a cosmic yardstick to measure curvature.
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