# Is all water curved

**URL:** <https://boards.straightdope.com/t/is-all-water-curved/947388>\
**Category:** Factual Questions\
**Created:** [July 27, 2021, 6:10am UTC](https://boards.straightdope.com/t/is-all-water-curved/947388 "2021-07-27T06:10:23Z")\
**Posts on this page:** 1\
**Showing post:** 38

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**Author:** ![hibernicus](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/hibernicus/32/2802_2.png) [@hibernicus](https://boards.straightdope.com/u/hibernicus)\
**Post date:** [July 29, 2021, 11:08pm UTC](https://boards.straightdope.com/t/is-all-water-curved/947388/38 "2021-07-29T23:08:57Z")

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> [@Schnitte](#):
>
> But the celestial equator is already well up high in the sky from that latitude (about 50° N), so in the lower left corner you can see the trails of some of the stars of the Southern hemisphere circling the Southern celestial pole.

Not so fast - in a recent discussion about this very phenomenon, it was persuasively argued that this is an optical illusion and that the stars below the celestial equator are also circling the Northern celestial pole.  
[Apparent motion of stars in the night sky - General Questions - Straight Dope Message Board](https://boards.straightdope.com/t/apparent-motion-of-stars-in-the-night-sky/943251)

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