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Any of you clever bods know 10:01 - Aug 24 with 1422 viewsbluelagos

How did the Greeks know that the shadows (a fair distance apart) were of different length at the same time?

[Post edited 24 Aug 2022 10:03]

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Any of you clever bods know on 10:12 - Aug 24 with 1359 viewsGuthrum

Because ancient astronomers both travelled themselves and wrote to each other. Having observed that midday shadows vary in length depending upon latitude (but not longitude), it's just a matter of finding a long enough baseline to make the calculation easy.

Edit: Wrong thing the parentheses.
[Post edited 24 Aug 2022 10:16]

Good Lord! Whatever is it?
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Any of you clever bods know on 10:16 - Aug 24 with 1338 viewsbluelagos

Any of you clever bods know on 10:12 - Aug 24 by Guthrum

Because ancient astronomers both travelled themselves and wrote to each other. Having observed that midday shadows vary in length depending upon latitude (but not longitude), it's just a matter of finding a long enough baseline to make the calculation easy.

Edit: Wrong thing the parentheses.
[Post edited 24 Aug 2022 10:16]


Cheers.

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Any of you clever bods know on 10:33 - Aug 24 with 1270 viewsDanTheMan

Carl Sagan was a truly excellent scientific communicator.

Eratosthenes was the person who calculated this, and also was able to calculate the circumference and tilt of the Earth. Remarkable man.

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Any of you clever bods know on 12:31 - Aug 24 with 1077 viewsmrshallisfit

Any of you clever bods know on 10:33 - Aug 24 by DanTheMan

Carl Sagan was a truly excellent scientific communicator.

Eratosthenes was the person who calculated this, and also was able to calculate the circumference and tilt of the Earth. Remarkable man.


Carl Sagan. "Millions and millions of stars".
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Any of you clever bods know on 12:38 - Aug 24 with 1059 viewsblueasfook

And to think there are still people in this day and age who believe the earth is flat.

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Any of you clever bods know on 12:48 - Aug 24 with 1018 viewsMookamoo

Any of you clever bods know on 12:38 - Aug 24 by blueasfook

And to think there are still people in this day and age who believe the earth is flat.


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Any of you clever bods know on 12:49 - Aug 24 with 1015 viewsDanTheMan

Any of you clever bods know on 12:38 - Aug 24 by blueasfook

And to think there are still people in this day and age who believe the earth is flat.


The cool new conspiracy are people who believe they are genetically engineered super soldiers who have fought against aliens on Mars.

https://www.wearethemighty.com/mighty-culture/marines-on-mars-conspiracy/

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Any of you clever bods know on 13:19 - Aug 24 with 956 viewsmutters

Any of you clever bods know on 10:33 - Aug 24 by DanTheMan

Carl Sagan was a truly excellent scientific communicator.

Eratosthenes was the person who calculated this, and also was able to calculate the circumference and tilt of the Earth. Remarkable man.


Cosmos is one of the best books I have read. For those that haven't read it and are interested in the subject then do find the time.

Carl Sagan is an absolute legend.

I do like this mash-up of the Matrix vs Carl Sagan


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Any of you clever bods know on 13:21 - Aug 24 with 943 viewsmutters

FYI

https://www.independent.co.uk/life-style/history/ancient-greeks-proved-earth-rou

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Any of you clever bods know on 15:45 - Aug 24 with 783 viewsNthQldITFC

Any of you clever bods know on 12:38 - Aug 24 by blueasfook

And to think there are still people in this day and age who believe the earth is flat.


I was laughing at one only the other day, and he took umbrage. Then he was moved to take umbrage again, and shortly realised the error of his ways.

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Any of you clever bods know on 15:46 - Aug 24 with 780 viewsArnoldMoorhen

Any of you clever bods know on 12:49 - Aug 24 by DanTheMan

The cool new conspiracy are people who believe they are genetically engineered super soldiers who have fought against aliens on Mars.

https://www.wearethemighty.com/mighty-culture/marines-on-mars-conspiracy/


Don't watch "Starship Troopers" on Super Skunk, kids. The flashbacks are to die for.
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