February 01, 2013

The Real Universe –”Is 250 Times Bigger than the Visible Hubble Volume (Today’s Most Popular)

Is our universe infinite or closed? Because the visible Universe is expanding, the most distant visible things are much further away than its estimated 14-billion year age. In fact, the photons in the cosmic microwave background have traveled a cool 45 billion light years to get here. That makes the visible universe some 90 billion light years across.

The real universe, however, is much bigger. We now know this thanks to statistical analysis by Mihran Vardanyan at the University of Oxford and colleagues.

The key to measuring the actual size of the universe is to measure its curvature. Astronomers have come up with various methods to measure this curvature. One method according to MIT’s Technology Review is to search for a distant object of known size and measure how big it looks: “If it’s bigger than it ought to be, the Universe is closed; if it’s the right size, the universe is flat and if it’s smaller, the Universe is open.”

Read more: The Real Universe –"Is 250 Times Bigger than the Visible Hubble Volume (Today's Most Popular) — Daily Galaxy.

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