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  1. Robert McNees (mcnees@mastodon.social)'s status on Wednesday, 13-Mar-2024 13:55:30 UTC Robert McNees Robert McNees

    A thread about the announcement of Pluto's discovery, Percival Lowell’s insistence that Mars hosted a civilization, the relatively unknown woman whose calculations supported Lowell’s hunt for“Planet X,” and Clyde Tombaugh's ashes sailing off into the darkness of deep space.
    https://mastodon.social/@mcnees/110016500960493362

    In conversation about 9 months ago from mastodon.social permalink

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    1. Robert McNees (@mcnees@mastodon.social)
      from Robert McNees
      Attached: 2 images Clyde Tombaugh's discovery of Pluto was announced #OTD in 1930. Here it is dashing across his photographic plates, alongside an image taken just after closest approach by NASA's New Horizons probe in July 2015. Images: Lowell Observatory/National Geographic (July 1939); NASA/JHUAPL/SwRI

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