View Full Version : Spitzer Provides Most Precise Measurement Yet of the Universe’s Expansion

2012-Oct-03, 06:40 PM
This graph illustrates the Cepheid period-luminosity relationship, which scientists use to calculate the size, age and expansion rate of the Universe. Credit: NASA/JPL-Caltech/Carnegie How fast is our Universe expanding? Over the decades, there have been different estimates used and heated debates over those approximations, but now data from the Spitzer Space Telescope has provided the [...]

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