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Telescope Captures Invisible Blue-Velvet Glow of Deep Space

Telescope Captures Invisible Blue-Velvet Glow of Deep SpaceTelescope Captures Invisible Blue-Velvet Glow of Deep Space

The whole sky appears to glow in a new photo from the European Southern Observatory (ESO). 

An international team of astronomers used the special eyes of the incredibly sensitive MUSE instrument on ESO's aptly named Very Large Telescope. The team peered into the Hubble Ultra Deep Field region and found "an unexpected abundance" of emissions from the early universe, Space.com reported.

From their observations, the researchers extrapolated that almost all of the sky is invisibly glowing as dim yet abundant clouds of hydrogen imperceptibly produce Lyman-alpha emissions. 

"This is a great discovery!" said team member Themiya Nanayakkara. "Next time you look at the moonless night sky and see the stars, imagine the unseen glow of hydrogen: the first building block of the universe, illuminating the whole night sky."

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