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Phil Plait (badastro@mastodon.social)'s status on Saturday, 23-Sep-2023 00:56:20 JST Phil Plait

Tonight is the equinox! But I bet it doesn't mean what you think it means!
Let me equisplain.
https://www.scientificamerican.com/article/the-equinox-is-not-what-you-think-it-is/

In conversation about a year ago from mastodon.social permalink
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  Paul Cantrell (inthehands@hachyderm.io)'s status on Saturday, 23-Sep-2023 01:17:31 JST Paul Cantrell
  in reply to
  
  @badastro
  This is great! (“nychthemeron” ←🧡)
  To clarify: on the equinox, if did measure the sun’s center against an ideal (flat landscape) horizon and without any atmospheric effects, •then• would day and night be equal on the equinox?
  
  In conversation about a year ago permalink

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