If you'd like to do something like that, mention that here. And maybe how you'd go about itI would suppose recording time of sunrise/sunset at a given latitude and longitude would be one way to go. Then after a lot of data is available from many places on different days, comparing those numbers to the supposed normal data would be simple.
Mentioned just now live at the beginning of#997 Amazing pizza, yin and yang, and a family member faces deportation
@not-quite-a-bear I also think it will check out (within a certain amount of slippage, there may be some surprises). I've spent time in multiple timezones and latitudes in NA/EU/Asia, and whenever I lookup sunrise/sunset data, it appears accurate. But I've never tried to get specific data and then see how accurate it really is. Even if the data gathered supports the conventional norms, that's still good to know.
As far as data gathering, I can set up a google form where you can input data, stored on google docs spreadsheet. Each submission could be set up as a form page such as:
(Select 1) Sunrise Sunset Moonrise Moonset
Latitude of observer ________
Longitude of observer ________
Method used to record latitude/longitude ________
Hour:minute:(second if you can swing it?) that the sun/moon is seen to begin rising or finish setting ________
It's not necessary to record every day but the more data the better. Atmospheric conditions may make it impossible to measure on some days anyway.
A common definition of sunrise/etc is however necessary. I suppose we could use the one defined by the US Navy:
Sunrise and sunset conventionally refer to the times when the upper edge of the disk of the Sun is on the horizon. Atmospheric conditions are assumed to be average, and the location is in a level region on the Earth's surface.
Moonrise and moonset times are computed for exactly the same circumstances as for sunrise and sunset. However, moonrise and moonset may occur at any time of day and, consequently, it is often possible for the Moon to be seen during daylight, and to have moonless nights. It is also possible that a moonrise or moonset does not occur relative to a specific place on a given date.
You can estimate around what time you should observe for the rising or setting here: https://keisan.casio.com/exec/system/1224689365
Let me know if this looks good or if there's anything that should be changed, and I'll make the form, procedure and definitions more clear.
Such a Google doc form as you propose looks good to me. I'd like to participate. I'm in hilly, mountainous territory, and am overshadowed by heights. It's hard to gauge an actual horizon, sometimes.
I have looked at https://keisan.casio.com/exec/system/1224689365, noting the DST (Daylight Saving Time) option, so I can refer to this useful tool for when to be on the lookout for a rising/setting.
NZ (like Chile) is a long, thin country orientated north to south, edging towards the south pole. Days are noticably longer in the south of NZ than the north of NZ during Summer. Longer twilights the further south one goes!
G'day @beehive-bear ... Beehive? What, are you a politician?. What I was specifically referring to was the hours of light visible in the southern hemisphere summer. The FE model with the north pole at it's centre and the sun circling the north pole works with the southern hemisphere winter and corresponding northern hemisphere summer. And with a widening arc till late December, it also works with the northern hemisphere winter . But the key factor to this model is the sun is very close to the earth. The fact that you in the south island can see the sun for nearly 2/3 of the day at the peak of summer is impossible with this model.
BB calls it a realm because there are a couple of things that don't add up...probably why he suggested checking sun locations. Another is the stars. We can see that southern cross year round but we'll never see the sky clock from here.
I don't understand satellites at night either. I was asking that question 40 years ago ..But those space x satellite trains that you mentioned. I peeked in that rabbit hole .. it is scary stuff
Thanks, @not-quite-a-bear. I understood the two points you made. You explained them very well: we're seeing 2/3rds of daylight in summer down south here; and we don't see the skyclock from down here.
Yes, I go with 'realm', too.
Hi, @NativeAsianBear , the sun-dial thIng is a bit too hard for my brain. If you can work it out, I'd love to know!
No, I'm not a politician, @not-quite-a-bear ! Perhaps a termites'-nest would have been a more appropriate design for our parliament buildings?