Earliest sunset time on 12/12/12
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- Dave Brown
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Earliest sunset time on 12/12/12
Yes odd, but true Although the longest night is (21/22) 12/2012,the earliest sunset is today on 12th. From today sunset times get later, although the days are still shortening. Sun rise times continue to get later until 1st Jan.
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Dave
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Re: Earliest sunset time on 12/12/12
The suns has turned the corner!
I do find this odd though, I would have thought it would be the winter solstice.
I do find this odd though, I would have thought it would be the winter solstice.
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Re: Earliest sunset time on 12/12/12
I wish it was fitted with a turbo
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: Earliest sunset time on 12/12/12
I believe it's because of the Earth's daily anti-clockwise rotation pushing against its anti-clockwise orbit of the sun, thus skewing the latest sunrise/ earliest sunset away from the actual winter solstice.
You'll notice that they're symmetrically pushed out by approx 10 days from the 21st.
edit - mistyped as I was working at the same time, honest!
You'll notice that they're symmetrically pushed out by approx 10 days from the 21st.
edit - mistyped as I was working at the same time, honest!
Last edited by RogerBacardy on Wed Dec 12, 2012 6:18 pm, edited 1 time in total.
- Dave Brown
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Re: Earliest sunset time on 12/12/12
It's clockwise viewed from the south pole, anticlockwise from the north pole. Where do they reference rotation from ?RogerBacardy wrote:I believe it's because of the Earth's daily clockwise rotation pushing against its anti-clockwise orbit of the sun, thus skewing the latest sunrise/ earliest sunset away from the actual winter solstice.
You'll notice that they're symmetrically pushed out by approx 10 days from the 21st.
Best regards
Dave
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Roll on summer.....
http://www.hardytropicals.co.uk
Dave
_________________________________________________
Roll on summer.....
http://www.hardytropicals.co.uk
Re: Earliest sunset time on 12/12/12
It's because the Earth's orbit is an ellipse, not a perfect circle. This means the Earth moves faster at some points of its orbit than others; at the moment it is running slightly ahead of its equivalent circular-orbit position, so sunrise and sunset times are pushed slightly backward.
- Dave Brown
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Re: Earliest sunset time on 12/12/12
I notice that we are getting closer to the sun looking at the chart so, am assuming that is the faster/flatter part of the orbit.Conifers wrote:It's because the Earth's orbit is an ellipse, not a perfect circle. This means the Earth moves faster at some points of its orbit than others; at the moment it is running slightly ahead of its equivalent circular-orbit position, so sunrise and sunset times are pushed slightly backward.
Best regards
Dave
_________________________________________________
Roll on summer.....
http://www.hardytropicals.co.uk
Dave
_________________________________________________
Roll on summer.....
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Re: Earliest sunset time on 12/12/12
Yep, that's right. Perihelion (closest to the sun) is on 4 January.Dave Brown wrote:I notice that we are getting closer to the sun looking at the chart so, am assuming that is the faster/flatter part of the orbit.Conifers wrote:It's because the Earth's orbit is an ellipse, not a perfect circle. This means the Earth moves faster at some points of its orbit than others; at the moment it is running slightly ahead of its equivalent circular-orbit position, so sunrise and sunset times are pushed slightly backward.
Re: Earliest sunset time on 12/12/12
Nope - that's different, the slow movement of the Earth's polar axis in a circle, takes about 26,000 years. See more here.GoggleboxUK wrote:So it's what's known as Procession then?