http://www.gocomics.com/bc/2011/12/21 Funny but at the same time sad to think there probably are people who really believe that. patrick
OK then, what is the shortest day of the year? Yes, I am talking about the actual day, not daylight. ________________________________ From: Patrick Wiggins <paw@wirelessbeehive.com> To: utah astronomy listserve utah astronomy <utah-astronomy@mailman.xmission.com> Sent: Thursday, December 22, 2011 7:18 PM Subject: [Utah-astronomy] From the funnies http://www.gocomics.com/bc/2011/12/21 Funny but at the same time sad to think there probably are people who really believe that. patrick _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php
Think Solar Day - not Mean Solar Day. I used to use this as an interview question. Wayne Sumner is disqualified to answer. ________________________________ From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Thursday, December 22, 2011 8:10 PM Subject: Re: [Utah-astronomy] From the funnies On 12/22/11, Brent Watson <brentjwatson@yahoo.com> wrote:
OK then, what is the shortest day of the year? Yes, I am talking about the actual day, not daylight.
March 11. Only 23 hours long. ;-) _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php
On 12/22/11, Brent Watson <brentjwatson@yahoo.com> wrote:
Think Solar Day - not Mean Solar Day. I used to use this as an interview question. Wayne Sumner is disqualified to answer.
Solar time only gets you what, 15-18 minutes deviation? Daylight Savings time loses an hour, lol. Yeah, I know, it's the Kobayashi Maru solution, but still fun. The bigger question is, interview question for what? The kid who mows your lawn?
I would ask it in the context of an engineering interview. After explaining Kepler's laws, I would ask the question. I didn't care if they got the right answer nearly as much as how they approached the problem. ________________________________ From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Friday, December 23, 2011 6:39 AM Subject: Re: [Utah-astronomy] From the funnies On 12/22/11, Brent Watson <brentjwatson@yahoo.com> wrote:
Think Solar Day - not Mean Solar Day. I used to use this as an interview question. Wayne Sumner is disqualified to answer.
Solar time only gets you what, 15-18 minutes deviation? Daylight Savings time loses an hour, lol. Yeah, I know, it's the Kobayashi Maru solution, but still fun. The bigger question is, interview question for what? The kid who mows your lawn? _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php
There is a bill being introduced to eliminate Daylight Savings Time in Utah.
On 12/22/11, Brent Watson <brentjwatson@yahoo.com> wrote:
OK then, what is the shortest day of the year? Yes, I am talking about the actual day, not daylight.
March 11. Only 23 hours long. ;-)
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Uh, how about Feb. 29th? It only exists one year in four. Good riddens to DST!!! :-) -----Original Message----- From: utah-astronomy-bounces+barrettwf=comcast.net@mailman.xmission.com [mailto:utah-astronomy-bounces+barrettwf=comcast.net@mailman.xmission.com] On Behalf Of erikhansen@thebluezone.net Sent: Friday, December 23, 2011 9:23 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] From the funnies
There is a bill being introduced to eliminate Daylight Savings Time in Utah.
On 12/22/11, Brent Watson <brentjwatson@yahoo.com> wrote:
OK then, what is the shortest day of the year? Yes, I am talking about the actual day, not daylight.
March 11. Only 23 hours long. ;-)
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I will say when the sun is closest to earth would be the shortest day.
Uh, how about Feb. 29th? It only exists one year in four. Good riddens to
DST!!! :-)
-----Original Message----- From: utah-astronomy-bounces+barrettwf=comcast.net@mailman.xmission.com [mailto:utah-astronomy-bounces+barrettwf=comcast.net@mailman.xmission.com] On Behalf Of erikhansen@thebluezone.net Sent: Friday, December 23, 2011 9:23 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] From the funnies
There is a bill being introduced to eliminate Daylight Savings Time in Utah.
On 12/22/11, Brent Watson <brentjwatson@yahoo.com> wrote:
OK then, what is the shortest day of the year? Yes, I am talking about the actual day, not daylight.
March 11. Only 23 hours long. ;-)
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Correct Eric. That makes the longest day of the year January 4 or thereabouts. ________________________________ From: "erikhansen@thebluezone.net" <erikhansen@thebluezone.net> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Friday, December 23, 2011 3:16 PM Subject: Re: [Utah-astronomy] From the funnies
I will say when the sun is closest to earth would be the shortest day.
Uh, how about Feb. 29th? It only exists one year in four. Good riddens to
DST!!! :-)
-----Original Message----- From: utah-astronomy-bounces+barrettwf=comcast.net@mailman.xmission.com [mailto:utah-astronomy-bounces+barrettwf=comcast.net@mailman.xmission.com] On Behalf Of erikhansen@thebluezone.net Sent: Friday, December 23, 2011 9:23 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] From the funnies
There is a bill being introduced to eliminate Daylight Savings Time in Utah.
On 12/22/11, Brent Watson <brentjwatson@yahoo.com> wrote:
OK then, what is the shortest day of the year? Yes, I am talking about the actual day, not daylight.
March 11. Only 23 hours long. ;-)
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If only I had an engineering degree.
Erik, now you have to mow Brent's lawn. ;-)
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Does the earth have static points of minimum and maximum angular velocity in relation to the seasons? And how much time are we talking about? On Dec 23, 2011, at 9:10 PM, "erikhansen@thebluezone.net" <erikhansen@thebluezone.net> wrote:
If only I had an engineering degree.
Erik, now you have to mow Brent's lawn. ;-)
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Not by much, minutes I suspect
http://nfo.edu/2factors.htm Does the earth have static points of minimum and maximum angular
velocity in relation to the seasons? And how much time are we talking about?
On Dec 23, 2011, at 9:10 PM, "erikhansen@thebluezone.net" <erikhansen@thebluezone.net> wrote:
If only I had an engineering degree.
Erik, now you have to mow Brent's lawn. ;-)
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Anybody familiar with the analema shouldn't be surprised by this. The earth doesn't change it's rotation rate at different times of the year. Solar time is an anachronism that only old-school navigators have to take into account, for the most part.
Except for relativistic effects, which are pretty small, the earth has the same velocity from year to year, but it varies with the position in the orbit - or season if you choose. The effect is larger than one might think. The variation from perihelion to aphelion is on the order of around plus or minus 20 seconds. The cumulative effect is a lag of around plus or minus 15 minutes. The equation of time describes thie difference. This is all due to the ellipticity of the earth's orbit. The rotational speed remains constant, but the revolutional speed varies slightly. From: Josh M <mountaindrifter@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Friday, December 23, 2011 9:49 PM Subject: Re: [Utah-astronomy] From the funnies Does the earth have static points of minimum and maximum angular velocity in relation to the seasons? And how much time are we talking about?
As I alluded, the anelemma is a graphic representation of Brents description. I was operating under the impression that most amateurs understood this. My apologies.
On 12/23/11, erikhansen@thebluezone.net <erikhansen@thebluezone.net> wrote:
There is a bill being introduced to eliminate Daylight Savings Time in Utah.
I know a lot of people who dislike DST, but being a gardener and working a lot of hours to pay the bills, I appreciate the extra hour of daylight during the growing season. It makes a huge difference in what I get done. My annual food bill is lessened considerably by my home produce, and it's much higher-quality food than what is available in grocery stores. It also helps reduce my blood pressure and I enjoy working the soil. A Zen-like experience than non-gardeners cannot comprehend. I still have ONE garden tomato left from this year's garden. I'm going to relish eating it, before I have to go back to those things from the grocer's that look like tomatoes, but taste like...nothing. :-( I also still have about a hundred pounds of winter squash and onions, as well as frozen green and yellow beans, that I will enjoy for months to come. The last of this year's okra went into a delicious pot of turkey minestrone soup that Kelly made for us last night. Yum! One vote in favor of keeping DST.
As a further aside, I know a fellow who did a hitch in the navy, and was almost violently opposed to DST. In his defense, he does have a severe case of OCD. His rationale: "Noon should be when the sun is exactly aligned North-South." (he had no idea what the 'meridian' is, but close enough...) I pointed out to him that this only occurs in Standard Time if you happen to live on the very eastern border of a time zone. In SLC, in about the middle of the mountain time zone, the sun is still close to a half-hour from being precisely aligned north-south at noon MST. Nobody uses Local Time anymore. If he happened to live near the western border of his time zone, the sun would be nearly an hour off even in Standard Time. He didn't get it. Kind of a disgrace for a navy vet, IMO. I guess they don't teach all recruits navigation.
participants (6)
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Barrett -
Brent Watson -
Chuck Hards -
erikhansen＠thebluezone.net -
Josh M -
Patrick Wiggins