Dark Energy Spectroscopic Instrument
(DESI, MS-DESI, MSDESI, Mid-scale Dark Energy Spectroscopic Instrument)
(new instrument for measuring red-shift of distant objects)
The Dark Energy Spectroscopic Instrument (DESI) is a
multi-object spectrograph intended to measure
redshifts of luminous red galaxies, quasars, emission line galaxies,
and Lyman-alpha QSOs,
to create a 3D cosmological map for dark energy research.
It includes 5000 fibers placed automatically using robotics.
It is installed on the Mayall 4m Telescope at Kitt Peak National Observatory (KPNO),
undergoing final adjustment and testing with hopes of beginning its
five-year survey before the end of 2020.
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