Register | Sign In


Understanding through Discussion


EvC Forum active members: 63 (9161 total)
4 online now:
Newest Member: popoi
Post Volume: Total: 915,585 Year: 2,842/9,624 Month: 687/1,588 Week: 93/229 Day: 4/61 Hour: 0/0


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   Question About the Universe
Perdition
Member (Idle past 3228 days)
Posts: 1593
From: Wisconsin
Joined: 05-15-2003


Message 15 of 373 (506973)
04-30-2009 3:36 PM
Reply to: Message 14 by Blue Jay
04-30-2009 2:50 PM


Re: Expansion and the Movement of Light
It also seems that, if each kilometer is thought of as expanding over a period of time, wouldn't much of the expansion between us and the other star be happening behind the light as it traveled? To my mind, this means that any light we're seeing didn't actually travel the entire distance from there to here.
I think it's the opposite. The expansion behind the light doesn't affect the light itself, so we don't see it. The expansion in front of the light, however, makes it travel longer than it would have to without any expansion, meaning the star was closer when the light was released than the total distance the light actually has to travel to reach us.

This message is a reply to:
 Message 14 by Blue Jay, posted 04-30-2009 2:50 PM Blue Jay has not replied

  
Newer Topic | Older Topic
Jump to:


Copyright 2001-2023 by EvC Forum, All Rights Reserved

™ Version 4.2
Innovative software from Qwixotic © 2024