Author Topic: crescent  (Read 3152 times)

Offline t k

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crescent
« on: October 18, 2019, 06:14:23 am »
I just found out that whenever a crescent appears in the night sky, one sees it upside down in the southern hemisphere.  So for example while the waxing crescent I see looks like my right hand curved in front of me, Darryl's looks like his left hand.  It was surprising when I read it before thinking about it seriously.  --- tk

Offline admin

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Re: crescent
« Reply #1 on: October 18, 2019, 09:52:16 am »
I never knew that and I have sailed the Southern Seas!
Best wishes,

Duncan

Offline Darryl

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Re: crescent
« Reply #2 on: October 18, 2019, 10:14:22 am »
We get everything back-to-front down here, Tk.  ;D

Offline Bertha

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Re: crescent
« Reply #3 on: October 18, 2019, 11:50:08 am »
I found several ways of explaining this phenomenon, but this one was the most interesting without being too technical: http://curious.astro.cornell.edu/about-us/46-our-solar-system/the-moon/observing-the-moon/135-does-the-moon-look-different-in-the-northern-and-southern-hemispheres-beginner
Bertha

Offline t k

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Re: crescent
« Reply #4 on: October 19, 2019, 02:08:22 am »
When I came to think about it, I noticed that Darryl and I look at the same moon but I do it standing or sitting roughly upside down from his point of view.  --- tk

Offline Darryl

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Re: crescent
« Reply #5 on: October 19, 2019, 10:10:00 am »
And I'm upside down from your point of view, Tk.
Come to think of it, is there such a thing as a right way up in space?? Does the universe have a top and a bottom?? The familiar view we all have of our Earth always has the Northern Hemisphere at the top. That, I assume, is because the earliest civilisations kicked off up there and the map makers and explorers came from what we call the north.
What would we be looking at if civilisation and exploration started from Australia? If you turn a world map the other way up and write the cities where they belong, the whole thing has a different perspective. But from a logical point of view, it is no less valid. Hmmmm?

Offline Bertha

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Re: crescent
« Reply #6 on: October 19, 2019, 11:48:06 am »
This is an interesting timeline and explanation with illustrations of the history of cartography.  Mostly, it's from the perspective of the northern hemisphere: https://www.gislounge.com/mapping-through-the-ages/

Here's a site with upside down maps!  https://www.flourish.org/upsidedownmap/
Bertha

Offline Darryl

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Re: crescent
« Reply #7 on: October 19, 2019, 01:19:55 pm »
That's amazing, Bertha. I never thought that someone would actually make fully-labelled upside down maps. And I never ceased to be amazed at what you manage to find on the 'net.

Offline Bertha

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Re: crescent
« Reply #8 on: October 21, 2019, 12:04:05 pm »
 :-*
Bertha

Offline Britta

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Re: crescent
« Reply #9 on: October 22, 2019, 08:26:08 am »
When I came to think about it, I noticed that Darryl and I look at the same moon but I do it standing or sitting roughly upside down from his point of view.  --- tk

If it's not used by a native speaker it's not idiomatic. And idiom trumps grammar every time. Jack Wilkerson†

Offline admin

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Re: crescent
« Reply #10 on: October 22, 2019, 01:46:47 pm »
 ;D
Best wishes,

Duncan

Offline Darryl

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Re: crescent
« Reply #11 on: October 23, 2019, 10:39:47 am »
 :)

Offline admin

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Re: crescent
« Reply #12 on: October 23, 2019, 11:11:39 am »
 ;D
Best wishes,

Duncan