A Space & astronomy forum. SpaceBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

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

Follow the line



 
 
Thread Tools Display Modes
  #1  
Old March 6th 19, 10:18 PM posted to sci.astro.amateur
Gerald Kelleher
external usenet poster
 
Posts: 1,551
Default Follow the line

https://svs.gsfc.nasa.gov/11353

This is where celestial sphere enthusiasm and modeling gets you all - a monstrosity that offers nothing but intellectual damnation.

Ads
  #2  
Old March 6th 19, 11:53 PM posted to sci.astro.amateur
Quadibloc
external usenet poster
 
Posts: 7,018
Default Follow the line

On Wednesday, March 6, 2019 at 3:18:49 PM UTC-7, Gerald Kelleher wrote:
https://svs.gsfc.nasa.gov/11353


This is where celestial sphere enthusiasm and modeling gets you all - a
monstrosity that offers nothing but intellectual damnation.


That is indeed an unusual orientation for a view "from space". The Sun doesn't
bounce up and down.

So the pattern of light on the Earth is shown... with the camera being oriented in a constant direction from the viewpont of people on Earth.

While this makes a point, the page is about the "reason" for the seasons, not
merely the facts of the seasons. If there were a series of Mercator maps showing
times of sunrise and sunset for the year, the fact that the continents would be
in the same place on all of them, and the colored overprinting showing night and
twilight changes would not be remarkable.

But this *appears* to show how things look _from space_, not _on Earth_, and so
you indeed have a valid point that it can be misleading in some respects.

Instead, they should have begun with photographs where the direction of the Sun
is consistent, or even diagrams showing the Earth moving from one side of the
Sun to the other, and only then go to the rotated versions of the photos.

John Savard
  #3  
Old March 8th 19, 10:31 AM posted to sci.astro.amateur
Gerald Kelleher
external usenet poster
 
Posts: 1,551
Default Follow the line

The tsunami of websites carrying RA/Dec modeling within the last few years is quite a spectacle. The seasons are a result of two surface rotations to the Sun acting in combinations yet because celestial sphere software has emerged as a dominant tool, the descriptions have followed suit when I thought it was simply an anomaly by a NASA technician.

http://www.planetary.org/blogs/emily...-seasonal.html


The Moon's circle of illumination always runs parallel with the Earth's as the axiom is that the circle of illumination is always at a right angle to the orbital plane -

https://solarsystem.nasa.gov/system/...Earth_Moon.jpg


How a society strayed into something worse than a flat Earth ideology should occupy the efforts of many people who can exercise their basic intuitive qualities to recognise what is beautiful from what is absurd.

An Earth with a zero degree inclination and a pivoting circle of illumination as a dynamic turns the mind to stone yet it is supported as though it was actual !. I thought people would at least have some pride in astronomy left but this will mark our era as the worst if it remains unchallenged.
  #4  
Old March 8th 19, 01:46 PM posted to sci.astro.amateur
Quadibloc
external usenet poster
 
Posts: 7,018
Default Follow the line

On Friday, March 8, 2019 at 3:31:58 AM UTC-7, Gerald Kelleher wrote:
The seasons are a result of two surface rotations to the Sun acting in combinations


And we've all turned to stone because we phrase it differently, we call it the
combination of the Earth's rotation with the change in the direction to the Sun
caused by the Earth's orbit around the Sun. That way we don't have to have the
Earth's rotation slowing down and speeding up.

John Savard
 




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
line as a dashed line in Euclidean Geometry may imply MaxwellEquations Post-Comment #2015 of 5th ed [email protected] Astronomy Misc 0 November 4th 13 05:34 AM
He can follow himself gb6726 Astronomy Misc 0 October 27th 07 04:05 PM
Follow people, public enemy #1, follow kookets, label biiggets kooket masses, follow and label gb6726 Astronomy Misc 20 April 21st 07 01:42 AM
A French Vegeratian and a Cannibal, Column (improved), walk in line, walk in line! [email protected] Astronomy Misc 0 March 23rd 07 07:03 PM
ASTRO: Splitting the 658.4 [NII] line from the 656.4 Halpha line Richard Crisp Astro Pictures 7 November 29th 06 06:14 AM


All times are GMT +1. The time now is 08:47 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2004-2019 SpaceBanter.com.
The comments are property of their posters.