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1. Robert McNees (mcnees@mastodon.social)'s status on Monday, 19-Aug-2024 16:19:49 UTC Robert McNees

   in reply to

   Besides working with Hubble, Humason collaborated with Fritz Zwicky, Allan Sandage, and many other noted astronomers.

   Humason also famously *missed* discovering Pluto eleven years before Clyde Tombaugh!

   He captured it on four plates in 1919 but didn’t realize a tiny planet was sailing across his photographs.

   Ref: https://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1931ApJ....73....1N&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf

2. Robert McNees (mcnees@mastodon.social)'s status on Monday, 13-Mar-2023 15:12:20 UTC Robert McNees

   in reply to

   (Pluto's official discovery was in 1930, but it was actually spotted eleven years earlier in 1919. Milton Humason captured it on four photographic plates while searching for trans-Neptunian planets, but didn't recognize it for what it was!
   https://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1931ApJ....73....1N&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf )