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End Of Daylight


cficare

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Guest Darren Masters

Then you get that stupid bird that comes down from PNG every Summer. Anyone heard it? Kind of does a wooo wooo stupid noise.

 

 

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someone could work out my latatide/longitude from that....

 

41° 4′ 45″ S



 

 

 

 

 

 

 

 

146° 50′ 20″ E



 

 

 

 

 

 

 

(or for google maps purposes)

 

-41.079167,



 

 

 

 

 

 

 

 

146.838889



 

 

 

 

 

 

;)

 

 

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Guest Darren Masters
Darren ... We have those birds here now , they are Koels ...I liked your wooo wooo description .:DDave C

That's the one Dave. Ha ha. Most annoying bird ever!

 

 

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Guest DavidH10
8:57 AEST tonight!someone could work out my latatide/longitude from that....

In my mind I see the shadow of night falling as a line across the Earth's surface that roughly describes a circle with diameter perpendicular to the Sun. Thus there is part of that circle (an arc) that will fall within the physical time zone boundaries for the given last light time and specified timezone. As the Earth is tilted on it's axis, if you could calculate the position of that arc for two dates that were sufficiently far apart that the arcs intersected due to the changed inclination, then "X" would mark the spot.

Apart from not having sufficient data, that level of maths is beyond me. :)

 

 

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