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SLAC National Accelerator Laboratory

45-Year-Old Telescope Gets a Makeover to Demystify Dark Energy

12 Feb 2018, 16:00 UTC
45-Year-Old Telescope Gets a Makeover to Demystify Dark Energy . Marenfeld/NOAO/AURA/NSF

Forty-five years ago this month, a telescope tucked inside a 14-story, 500-ton dome atop a mile-high peak in Arizona took in the night sky for the first time and recorded its observations on glass photographic plates. Today, the dome closes on the previous science chapters of the 4-meter Nicholas U. Mayall Telescope and starts preparing for its new role in creating the largest 3-D map of the universe. This map could help determine why the universe is expanding at faster and faster rates, driven by an unknown force called dark energy.

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