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![]() Hi all, Happy Springtime! I took this picture last year, of the sun setting due west, about 15 minutes after the Vernal Equinox (7:08pm Central time). Roads here in the Midwest run very close to E-W for the most part. This part of north-west Illinois is composed of low rolling hills that the glaciers did not mow down. In the flatter parts of southern Illinois, the roads run for miles in a very straight line. The settlers who first laid out these roads most probably used a magnetic compass to determine north. Fortunately here the magnetic north and true north are almost exactly the same. http://www.astromart.com/common/imag...7.jpg&caption= This next photo shows the sun almost on the horizon, but because of atmospheric refraction, it is already set and just below the horizon. It is therefore slightly north of true west because of the angle of the setting sun at our 42 degree latitude. http://www.astromart.com/common/imag...8.jpg&caption= Uncaslurpie |
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On Saturday, March 19, 2016 at 7:13:27 PM UTC, SlurpieMcDoublegulp wrote:
Hi all, Happy Springtime! http://antarcticsun.usap.gov/aroundT...unset_2010.jpg Sunset at the South pole with the event due to a separate rotation to your picture of daily sunset and its daily rotational cause. You can't help yourself by inserting the 'vernal' description used by celestial sphere enthusiasts thereby you are unable to appreciate the Earth's two distinct day/night cycles with two types of sunsets happening tomorrow. |
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On Saturday, March 19, 2016 at 2:13:27 PM UTC-5, SlurpieMcDoublegulp wrote:
Hi all, Happy Springtime! I took this picture last year, of the sun setting due west, about 15 minutes after the Vernal Equinox (7:08pm Central time). Roads here in the Midwest run very close to E-W for the most part. This part of north-west Illinois is composed of low rolling hills that the glaciers did not mow down. In the flatter parts of southern Illinois, the roads run for miles in a very straight line. The settlers who first laid out these roads most probably used a magnetic compass to determine north. Fortunately here the magnetic north and true north are almost exactly the same. http://www.astromart.com/common/imag...7.jpg&caption= This next photo shows the sun almost on the horizon, but because of atmospheric refraction, it is already set and just below the horizon. It is therefore slightly north of true west because of the angle of the setting sun at our 42 degree latitude. http://www.astromart.com/common/imag...8.jpg&caption= Uncaslurpie Just a quick image of M65-M66 in Leo taken last 2 nights before the Moon got too bright and full. 10x10 minute exposures, STL11K camera, 12" F8 Astrograph, here at my light polluted Illinois observatory. http://www.astromart.com/common/imag...9.jpg&caption= Leo rising after 9pm proves that spring is coming and songbirds are close behind. |
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On Sat, 19 Mar 2016 12:13:22 -0700 (PDT), SlurpieMcDoublegulp
wrote: Roads here in the Midwest run very close to E-W for the most part. Does that mean you often must gett off the roads there if you want to travel north or south? |
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On Sun, 20 Mar 2016 07:03:39 +0100, Paul Schlyter wrote:
Does that mean you often must gett off the roads there if you want to travel north or south? :-) , My gps instructs me to drive "off-road" for my driveway - which runs N/S. What Roland's descrbing is that in parts of the mid-west many of the roads were plotted very close to true E/W and N/S. -- Email address is a Spam trap. |
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oriel36 wrote:
On Saturday, March 19, 2016 at 7:13:27 PM UTC, SlurpieMcDoublegulp wrote: Hi all, Happy Springtime! http://antarcticsun.usap.gov/aroundT...unset_2010.jpg Sunset at the South pole with the event due to a separate rotation to your picture of daily sunset and its daily rotational cause. You can't help yourself by inserting the 'vernal' description used by celestial sphere enthusiasts thereby you are unable to appreciate the Earth's two distinct day/night cycles with two types of sunsets happening tomorrow. Don't make silly mistakes! His photograph was taken in the northern hemisphere so it's the vernal equinox. |
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On Sunday, March 20, 2016 at 8:00:43 PM UTC, Mike Collins wrote:
oriel36 wrote: On Saturday, March 19, 2016 at 7:13:27 PM UTC, SlurpieMcDoublegulp wrote: Hi all, Happy Springtime! http://antarcticsun.usap.gov/aroundT...unset_2010.jpg Sunset at the South pole with the event due to a separate rotation to your picture of daily sunset and its daily rotational cause. You can't help yourself by inserting the 'vernal' description used by celestial sphere enthusiasts thereby you are unable to appreciate the Earth's two distinct day/night cycles with two types of sunsets happening tomorrow. Don't make silly mistakes! His photograph was taken in the northern hemisphere so it's the vernal equinox. The Northern hemisphere has two distinct sunrises today while the Southern hemisphere has two distinct sunsets due to two separate rotations to the central Sun going on simultaneously.This and this alone defines the Equinoxes. Celestial sphere enthusiasts and their magnification exercise wouldn't get something so beautiful as dual sunrises and sunsets in a single day let alone the causes of polar dawn and twilight. So, two sunrises in the Northern hemisphere balanced with two sunsets in the Southern hemisphere and that is the Equinox, something which has been going on throughout life on the planet. |
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On Sunday, March 20, 2016 at 2:03:44 AM UTC-4, Paul Schlyter wrote:
On Sat, 19 Mar 2016 12:13:22 -0700 (PDT), SlurpieMcDoublegulp wrote: Roads here in the Midwest run very close to E-W for the most part. Does that mean you often must gett off the roads there if you want to travel north or south? You are expected to know exactly what he means. Your words, however, can be interpreted in any way that he prefers. /end sarcasm |
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On Sunday, March 20, 2016 at 4:00:43 PM UTC-4, Mike Collins wrote:
oriel36 wrote: On Saturday, March 19, 2016 at 7:13:27 PM UTC, SlurpieMcDoublegulp wrote: Hi all, Happy Springtime! http://antarcticsun.usap.gov/aroundT...unset_2010.jpg Sunset at the South pole with the event due to a separate rotation to your picture of daily sunset and its daily rotational cause. You can't help yourself by inserting the 'vernal' description used by celestial sphere enthusiasts thereby you are unable to appreciate the Earth's two distinct day/night cycles with two types of sunsets happening tomorrow. Don't make silly mistakes! His photograph was taken in the northern hemisphere so it's the vernal equinox. Notice that PC peterson hasn't chimed in yet about the OP's use of the term "vernal equinox." |
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On Tuesday, 22 March 2016 09:43:54 UTC+1, wrote:
Notice that PC Peterson hasn't chimed in yet about the OP's use of the term "vernal equinox." I was waiting for 1464 to start raving about multi-resistant vernal disease when Equinox began to fail as the go-to prescriptive medicine. ;-) |
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