Spitzer Provides Most Precise Measurement Yet of the Universe’s Expansion

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/CarnegieHow 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 most precise measurement yet of the Hubble constant, or the rate at which our universe is stretching apart. The result? The Universe is getting bigger a little bit faster than previously thought. (...)Read the rest of Spitzer Provides Most Precise Measurement Yet of the Universe’s Expansion (670 words)© nancy for Universe Today, 2012. | Permalink | No comment | Post tags: Expansion of the Universe, Hubble constant, Spitzer Space Telescope Feed enhanced by Better Feed from Ozh