Posted on 09/22/2024 11:32:10 AM PDT by MtnClimber
Explanation: Chicago, in a way, is like a modern Stonehenge. The way is east to west, and the time is today. Today, and every equinox, the Sun will set exactly to the west, everywhere on Earth. Therefore, today in Chicago, the Sun will set directly down the long equatorially-aligned grid of streets and buildings, an event dubbed #chicagohenge. Featured here is a Chicago Henge picture taken during the equinox in mid-September of 2017 looking along part of Upper Wacker Drive. Many cities, though, have streets or other features that are well-aligned to Earth's spin axis. Therefore, quite possibly, your favorite street may also run east - west. Tonight at sunset, with a quick glance, you can actually find out.
For more detail go to the link and click on the image for a high definition image. You can then move the magnifying glass cursor then click to zoom in and click again to zoom out. When zoomed in you can scan by moving the side bars on the bottom and right side of the image.
🪐 🌟 🌌 🍔
How does the equinox affect armed cheeseburger thefts in Chicago?
Today’s photo was taken in 2017. Too dangerous for public interest events in downtown Chi-Town these days.
“...Today, and every equinox, the Sun will set exactly to the west, everywhere on Earth...”
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Not really.
Exactly correct. I like the thought of the NASA-sponsored photo but the oversimplification and “exactly” comment drive me to distraction.
‘Course I’m an anal biophysicist/engineer who laid out my house using a transit and WWV to within 0.004 degrees.
Here, to the asccuracy expected because of atmospheric conditions, are this year’s autumnal equinox sunset azimurths for places I’ve been during the equinox:
Sun
Federal Point, FL xxxxxxxxxxxxx
Location: W 81°32’26.4”, N29°44’46.0”,
Date Set Az
(UT1)
h m h m °
2024 Sep 21 (Sat) 23:23 271
2024 Sep 22 (Sun 23:22 270
St George Island, South Shetlands
Location: W 58°57’00.0”, S62°11’00.0”,
Date Set Az.
(UT1)
h m h m °
2024 Sep 21 (Sat) 21:54 269
2024 Sep 22 (Sun) 21:56 268
Fairbanks, Alaska airport
Location: W147°51’40.4”, N64°48’57.9”,
Date Set Az.
(UT1)
h m h m °
2024 Sep 21 (Sat) 03:57 273
2024 Sep 22 (Sun) 03:53 272
Reykjavik, Iceland
Location: W 21°56’00.0”, N64°08’00.0”,
Date Set Az.
(UT1)
h m h m °
2024 Sep 21 (Sat) 19:30 272
2024 Sep 22 (Sun) 19:27 271
Rio de Janeiro, Brazil xxxxxxx
Location: W 43°17’44.1”, S23°00’51.2”,
Date Set Az.
(UT1)
h m h m °
2024 Sep 21 (Sat) 20:49 270
2024 Sep 22 (Sun) 20:49 270
Did the sun set “exactly due west” on the day of the equinox
anywhere other than the equator?
Which direction is “west” from the poles?
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