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

The First Known Interstellar Comet



 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #32  
Old November 2nd 17, 04:09 PM posted to sci.astro.amateur
Gerald Kelleher
external usenet poster
 
Posts: 1,551
Default The First Known Interstellar Comet

On Thursday, November 2, 2017 at 2:36:11 PM UTC, Chris L Peterson wrote:
On Thu, 2 Nov 2017 07:04:54 -0700 (PDT), Gerald Kelleher
wrote:

When Venus reaches its widest point after it emerges as an evening appearance it will then turn back in front of the Sun and move from left to right until it overtakes us and becomes a morning appearance once more.


What do "left" and "right" mean? If I walk outside today and look up
at the Sun


You look out at the central Sun and stationary Sun and not up. If you can't put the central reference for all motions in correct context and drop up/below or North/South (which are rotational terms) it is impossible to reference orbital motions to either the moving Earth, to the stationary Sun or to the other planets.

I don't blame you, you have a rotating celestial sphere in your head and can't adjust to the recognized motions of Venus and Mercury in their transition from an evening to a morning appearances which is to say from left to right of the Sun as seen from a slower moving Earth as the planet overtakes us or from right to left or a morning to evening appearance as the planet moves behind the Sun -

http://www.popastro.com/images/plane...ary%202012.jpg

Maybe somebody else will explain to you that we see the faster moving Venus and Mercury run their circuits around a stationary Sun much like Jupiter's satellites will move from left to right and then from right to left of their parent planet -

https://www.youtube.com/watch?v=FcrBAuLBXag










 




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
MUST SEE COMET PHOTOS!! 23jan07 MASSIVE TAIL (Comet McNaught 2007) [email protected] Amateur Astronomy 1 January 23rd 07 10:56 AM
Comet McNaught: Brightest Comet in 30 Years On Display Tonight Warhol Misc 1 January 11th 07 02:16 AM
History's greatest comet hunter discovers 1000th comet Jacques van Oene News 0 August 19th 05 05:38 PM
History's greatest comet hunter discovers 1000th comet Jacques van Oene News 0 August 19th 05 05:32 PM
History's greatest comet hunter discovers 1000th comet (Forwarded) Andrew Yee Astronomy Misc 0 August 19th 05 01:57 PM


All times are GMT +1. The time now is 09:29 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.