It varies as the sun height and day length is a sine wave so day length and sun height movement are slowest around the summer and winter solstice and fastest around the equinox.billdango wrote: After that it gradually gets lighter i think by about 4 minutes per day.
THE SHORTEST DAY.
- Dave Brown
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Re: THE SHORTEST DAY.
Best regards
Dave
_________________________________________________
Roll on summer.....
http://www.hardytropicals.co.uk
Dave
_________________________________________________
Roll on summer.....
http://www.hardytropicals.co.uk
Re: THE SHORTEST DAY.
I'd love to Kata but it happens in pitch black darkness so you wouldn't be able to see anything!kata wrote:Prove it....
I bet you would love it though!
Re: THE SHORTEST DAY.
Would I Springy,
How do you know that...
We are still talking may polling are we...frillies n all that finished off with pretty ribbons...HAHAHAHAHAHAHA
How do you know that...
We are still talking may polling are we...frillies n all that finished off with pretty ribbons...HAHAHAHAHAHAHA
Re: THE SHORTEST DAY.
To all our experts in Astronomy, Meteorology and Pure Mathematics - What's behind the following anomaly around the shortest day? :
In London, the shortest day has a sunrise at 8:02 and a sunset at 15:54 giving a daylight total of 7 hours and 52 minutes. About ten days either side of this, the daylight totals are equally 7 hours and 57 minutes.
The sunrise and sunset times do not separate in equal lengths, however.
On 12th December the London sunrise is 7:55 and the sunset is 15:52 - two minutes earlier than that of the shortest day.
Conversely, on 31st December the sunrise is 8:05 (three minutes later than that of the shortest day) and the sunset is 16:02.
Simply put: Why is the earliest sunset in the year more than a week before the shortest day and why is the latest sunset in the year more than a week past the shortest day?
The shortest (and simplest) answer wins the longest night out (this time next year)
In London, the shortest day has a sunrise at 8:02 and a sunset at 15:54 giving a daylight total of 7 hours and 52 minutes. About ten days either side of this, the daylight totals are equally 7 hours and 57 minutes.
The sunrise and sunset times do not separate in equal lengths, however.
On 12th December the London sunrise is 7:55 and the sunset is 15:52 - two minutes earlier than that of the shortest day.
Conversely, on 31st December the sunrise is 8:05 (three minutes later than that of the shortest day) and the sunset is 16:02.
Simply put: Why is the earliest sunset in the year more than a week before the shortest day and why is the latest sunset in the year more than a week past the shortest day?
The shortest (and simplest) answer wins the longest night out (this time next year)
Re: THE SHORTEST DAY.
It's because the Earth's orbit is elliptical, not circular. With an elliptical orbit, the Earth doesn't move round the sun at a constant speed, but is faster at some times (when closer to the sun) than others (slower when more distant from the sun). But regular clock time assumes a circular orbit with equal 24 hour divisions. The result is that the Earth is sometimes slightly 'ahead' of the position it would have on a circular orbit, sometimes slightly 'behind', pushing both sunrise and sunset forward or backward by a few minutes.GREVILLE wrote:To all our experts in Astronomy, Meteorology and Pure Mathematics - What's behind the following anomaly around the shortest day? :
In London, the shortest day has a sunrise at 8:02 and a sunset at 15:54 giving a daylight total of 7 hours and 52 minutes. About ten days either side of this, the daylight totals are equally 7 hours and 57 minutes.
The sunrise and sunset times do not separate in equal lengths, however.
On 12th December the London sunrise is 7:55 and the sunset is 15:52 - two minutes earlier than that of the shortest day.
Conversely, on 31st December the sunrise is 8:05 (three minutes later than that of the shortest day) and the sunset is 16:02.
Simply put: Why is the earliest sunset in the year more than a week before the shortest day and why is the latest sunset in the year more than a week past the shortest day?
The shortest (and simplest) answer wins the longest night out (this time next year)
Much more detail about it here. Be warned, it's quite complex
Re: THE SHORTEST DAY.
Congrats to Conifers - the only man brave enough to provide a simple answer
I think my astronomy encyclopedia was quoted by Wiki as the explanations are near enough the same. A student asked me this recently and I had the devils own job trying to give him a simple answer Hope you don't fine me for copyright
BTW the prize has gone to the best place in England - the longest night out will be much longer in Northumberland than anywhere down here - awarded on the shortest day
I think my astronomy encyclopedia was quoted by Wiki as the explanations are near enough the same. A student asked me this recently and I had the devils own job trying to give him a simple answer Hope you don't fine me for copyright
BTW the prize has gone to the best place in England - the longest night out will be much longer in Northumberland than anywhere down here - awarded on the shortest day
Re: THE SHORTEST DAY.
At least for a wonder, it won't be a cold night out! Still just over 10° here
Re: THE SHORTEST DAY.
Todays the day?
Everything gets better from now on and spring is not that far off.
Billdango.
Everything gets better from now on and spring is not that far off.
Billdango.
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Re: THE SHORTEST DAY.
Spring is a full season away.....today is the first day of winter !
AKA - Martin
Wish list - Big Palms or Dicksonia antarctica's but open to anything really.....Cash Waiting !
Wish list - Big Palms or Dicksonia antarctica's but open to anything really.....Cash Waiting !
Re: THE SHORTEST DAY.
Yeehar!! I'm all dolled up in my frillies and ribbons and dancing my tights off!
Maybe that is too much information!!
Roll on spring!
Maybe that is too much information!!
Roll on spring!
Re: THE SHORTEST DAY.
True? but it still feels good thinking about it?The Codfather wrote:Spring is a full season away.....today is the first day of winter !
Anyway; Spring often starts here on the South coast by mid February.
billdango
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Re: THE SHORTEST DAY.
Bill your spring would equal mt summer
But yes, 3 mins a day lighter.
But yes, 3 mins a day lighter.
AKA - Martin
Wish list - Big Palms or Dicksonia antarctica's but open to anything really.....Cash Waiting !
Wish list - Big Palms or Dicksonia antarctica's but open to anything really.....Cash Waiting !