[HN Gopher] Dark energy spectroscopic instrument creates largest...
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       Dark energy spectroscopic instrument creates largest 3D map of the
       cosmos
        
       Author : layer8
       Score  : 30 points
       Date   : 2022-01-14 19:09 UTC (3 hours ago)
        
 (HTM) web link (newscenter.lbl.gov)
 (TXT) w3m dump (newscenter.lbl.gov)
        
       | peter303 wrote:
       | DESI is just one of the super-mapping scopes to come online in
       | late 2010s-early 2020s. There GAIA about 3/4 through its program
       | to map the positions and movement of 2 billion stars (2%) in the
       | Milky Way. And the Roman telescope will rephotograph much of sky
       | at least once a week, looking objects that change brightness or
       | position- about 10,000,000 expected a night. These could be new
       | asteroids, Planet X, super novea, etc.
        
       | ArtWomb wrote:
       | For deep background, Michael S. Turner just published a nice
       | review of the past 50 years of cosmology, from when the "errors
       | were in the exponents" ;)
       | 
       | The Road to Precision Cosmology
       | 
       | https://arxiv.org/abs/2201.04741
        
       | jrootabega wrote:
       | What causes the dark radial stripes? Blocked by something in the
       | sky? Downtime?
       | 
       | I know Elite Dangerous has similar artifacts showing small radial
       | areas of the galaxy that our telescopes have surveyed (but it's
       | lines of stars rather than lines of darkness)
        
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       (page generated 2022-01-14 23:00 UTC)