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Old 05-13-2014, 03:12 PM
 
1,690 posts, read 2,061,610 times
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Equation of time - Wikipedia, the free encyclopedia

In the watch faster/watch slower graph ...second from the top

The Max and mins are where the solar day is exactly 24 hours

The zeros are where the solar clock and regular clock reach perfect synchronization on all longitudes that are divisible by 15, assuming no DST hour forward

At points where the solar day is less than 24 hours, the solar noon moves earlier and earlier each day, and vice versa for more than 24 hours

The mins and maxes are not the same each time ...that asymmetry is due to the earth distance from the sun being closest during northern hemisphere winter which is not neutral to both hemispheres

Last edited by EricS39; 05-13-2014 at 03:29 PM..

 
Old 05-13-2014, 03:54 PM
nei nei won $500 in our forum's Most Engaging Poster Contest - Thirteenth Edition (Jan-Feb 2015). 

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Location: Western Massachusetts
45,983 posts, read 53,514,859 times
Reputation: 15184
Quote:
Originally Posted by Mac15 View Post
You are living in a fake timezone.

At 48N you don't get 10pm sunsets naturally.
The latest sunset naturally where I live is 8:45pm
I don't understand why I should care where my time zone is real or fake either.
 
Old 05-14-2014, 12:36 AM
 
Location: London, UK
2,688 posts, read 6,566,536 times
Reputation: 1757
Quote:
Originally Posted by Mac15 View Post
Yes you do.

Your summer daylength is nothing in comparison to mine. Almost 18 hours!!!
A big chunk of it being wasted when one sleeps for 8-9 hours a day, and in turn compensated by much worsened darkness for September to March. Along with a paler sunshine throughout the year. I repeat, nothing to envy.
 
Old 05-14-2014, 01:45 AM
 
Location: Bremerhaven, NW Germany
2,714 posts, read 3,046,009 times
Reputation: 934
Well from today on, astronomical twilight won't end.
Lasted end of Nautical twilight will be on at 00:30 around summer solstice
and earliest begin about 02:25.

14th May 2014
Astronomical Dawn: permanent
Nautical Dawn: 03:39
Civil Dawn: 04:42
Sunrise: 05:26
Solar Noon: 13:22
Sunset: 21:18
Civil Dusk: 22:02
Nautical Dusk: 23:06
Astronomical Dusk: permanent
Max sun angle: 55.1°
 
Old 05-14-2014, 03:07 AM
 
Location: North West Northern Ireland.
20,633 posts, read 23,887,822 times
Reputation: 3107
Quote:
Originally Posted by dhdh View Post
A big chunk of it being wasted when one sleeps for 8-9 hours a day, and in turn compensated by much worsened darkness for September to March. Along with a paler sunshine throughout the year. I repeat, nothing to envy.
Clearly rife with jealously with them roll eyes. I mean who wouldn't want 18 hours of daylight.
 
Old 05-14-2014, 04:32 AM
 
Location: London, UK
2,688 posts, read 6,566,536 times
Reputation: 1757
You win kid. I really wish I could live in northern Ireland
 
Old 05-14-2014, 04:47 AM
 
Location: North West Northern Ireland.
20,633 posts, read 23,887,822 times
Reputation: 3107
Yes of course!!!!!
 
Old 05-14-2014, 05:34 AM
 
4,658 posts, read 3,659,982 times
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Tomorrow is expected to be sunny with a max of 37C. It's a good news since i will do the scouts' camping Thu - Sat

For tomorrow

15 Mei 2014
AT 04:54 19:28
NT 05:19 19:02
CT 05:44 18:37
Sun 06:06 18:15
Az 71° 289°
DL 12h 08m 28s
Diff + 02s
SN 12:11, 71,7° N
Average dist. 1.51205*10^11 m
 
Old 05-14-2014, 11:32 AM
 
6,908 posts, read 7,672,495 times
Reputation: 2595
Quote:
Originally Posted by dhdh View Post
A big chunk of it being wasted when one sleeps for 8-9 hours a day, and in turn compensated by much worsened darkness for September to March. Along with a paler sunshine throughout the year. I repeat, nothing to envy.
No kidding, who wants it do be light out when going to sleep? I sure don't.
 
Old 05-14-2014, 02:47 PM
 
Location: Trondheim, Norway - 63 N
3,600 posts, read 2,694,971 times
Reputation: 1872
I actually enjoy 24-hr daylight. No problem sleeping, and it's so practical to get rid of the darkness outside. But then, I have lived for many years where there are no night in summer, so I am used to it.

The light at night in the summers north of 62 N are so...soft, with that very low sun/sun just below the horizon hour after hour.

Btw September and March in the very northern latitudes have the same daylight as more southern latitudes (September slightly more, March slightly less).
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