Hubble telescope helps find six 'dead' galaxies from the early universe

You'd think large galaxies in the early universe would have had plenty of 'fuel' left for new stars, but a recent discovery suggests that wasn't always the case. Astronomers using the Hubble Space Telescope and the Atacama Large Millimeter/Submillimeter Array (ALMA) have found six early galaxies (about 3 billion years after the Big Bang) that were unusually "dead" -- that is, they'd run out of the cold hydrogen necessary for star formation. This was the peak period for star births, according to ...