[HN Gopher] DESI's Dizzying Results
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       DESI's Dizzying Results
        
       Author : belter
       Score  : 19 points
       Date   : 2025-11-17 17:39 UTC (5 hours ago)
        
 (HTM) web link (www.universetoday.com)
 (TXT) w3m dump (www.universetoday.com)
        
       | swiftcoder wrote:
       | > They're aiming for 50 million galaxies once the survey is
       | complete... Sure, the DESI survey is less than 1% of all the
       | galaxies in the observable volume of the cosmos
       | 
       | That just broke my brain. Had to look it up. 2+ trillion galaxies
       | in the observable universe? That puts things in perspective all
       | right
        
         | omnicognate wrote:
         | Each one thousands to hundreds of thousands of light years
         | across, and with millions of light years between them.
        
       | jgalt212 wrote:
       | I wish there was a prediction market for dark energy: real or
       | fudge factor.
        
       | jmward01 wrote:
       | My dark energy/expansion of the universe thought experiment is
       | still this: when you throw a ball up in an expanding universe,
       | how fast does it come back down? This is (clearly) not my field
       | but this basic question just seems to lead fun places. No matter
       | how I think about this question I always come back to the idea
       | that matter seems special in an expanding universe since it seems
       | to extract energy from nothing if the universe is expanding
       | uniformly. As we learn more I hope to get a good explanation for
       | this question one day.
        
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       (page generated 2025-11-17 23:01 UTC)