A Space & astronomy forum. SpaceBanter.com

Go Back   Home » SpaceBanter.com forum » Astronomy and Astrophysics » Amateur Astronomy
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

Defining the Equinox



 
 
Thread Tools Display Modes
  #1  
Old August 31st 17, 07:45 PM posted to sci.astro.amateur
Gerald Kelleher
external usenet poster
 
Posts: 1,551
Default Defining the Equinox

No offence to the 'first point of aries' guys and their notion of the Sun's motion across an imagined celestial equator,the Sun coming into view on the Equinox at either the North or South pole creates the spectacle of two types of sunrises within a weekday and defines the Equinox -

The extended polar dawn ends with the appearance of the Sun -

https://www.usap.gov/videoclipsandmaps/spwebcam.cfm
  #2  
Old September 2nd 17, 04:14 PM posted to sci.astro.amateur
Gerald Kelleher
external usenet poster
 
Posts: 1,551
Default Defining the Equinox

Somebody at NASA actually sat down and manipulated imaging to define the Equinox as a moment when the circle of illumination becomes vertical and I will exclude the exclamation marks out of dismay -

https://apod.nasa.gov/apod/ap170319.html

Do not know why something as the extended polar dawn doesn't draw people towards polar sunrise in 3 weeks but such is our world at the moment -

https://www.usap.gov/videoclipsandmaps/spwebcam.cfm


  #3  
Old September 4th 17, 08:24 AM posted to sci.astro.amateur
Gerald Kelleher
external usenet poster
 
Posts: 1,551
Default Defining the Equinox

The RA/Dec enthusiasts not only have the Sun moving North/South against the background stars but also doing a figure 8 analemma over a year. What to make of people sometimes so they become experts in magnification equipment and then pass it off as an interest in astronomy.

http://www.nakedeyeplanets.com/const...c-labelled.png

http://solar-center.stanford.edu/ima...102816-UTC.jpg

The health of any society in antiquity was always tied in with their astronomical understanding and left in buildings like the neolithic monuments or the Egyptians so when astronomy is in a poor state it also reflects a chaotic society at the social level.
  #4  
Old September 4th 17, 09:34 AM posted to sci.astro.amateur
[email protected]
external usenet poster
 
Posts: 306
Default Defining the Equinox

On Monday, September 4, 2017 at 8:24:31 AM UTC+1, Gerald Kelleher wrote:
The RA/Dec enthusiasts not only have the Sun moving North/South against the background stars but also doing a figure 8 analemma over a year.


If you ever looked at the sky, you would see that both of these things happen up there.

But I know, your kind of astronomy happens only inside your head, and looking at the sky would only confuse you. Better to misunderstand random gifs and Youtube animations so that they agree with your delusions of grandeur.
  #5  
Old September 4th 17, 10:41 AM posted to sci.astro.amateur
Gerald Kelleher
external usenet poster
 
Posts: 1,551
Default Defining the Equinox

Presently the South Pole radio telescope camera presents a puzzling picture -

https://www.usap.gov/videoclipsandmaps/spwebcam.cfm

With about 17 days to the Equinox, the South pole would be around 17 degrees from the circle of illumination before the Sun comes into view for the first time in 6 months. Perhaps, like latitudes where the Sun comes into view each weekday due to daily rotation, there is a central point of luminescence before the Sun appears notwithstanding the daily rotational inputs which influence observations at the South Pole.
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
defining photo Mike Thomas[_2_] Amateur Astronomy 0 July 30th 08 04:33 AM
Defining a Time Constant q-bit Astronomy Misc 77 September 1st 07 06:18 PM
Papers Defining Model Mechanics kenseto Astronomy Misc 7 April 20th 05 09:14 PM
How are we defining Inteligence? Linda SETI 39 September 24th 04 04:44 AM
The 14 Defining Characteristics Of Fascism * Astronomy Misc 32 May 6th 04 12:54 AM


All times are GMT +1. The time now is 01:31 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 SpaceBanter.com.
The comments are property of their posters.