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Author Topic:   How did a new satellites get in the right position?
LouieP
Junior Member (Idle past 5841 days)
Posts: 12
From: Schererville, IN
Joined: 01-02-2008


Message 33 of 35 (445668)
01-03-2008 11:18 AM


the expansion
is the expansion of space itself observable to us, via calculation of the distance from the earth to sun or maybe the sun to Uranus, or are these distances relatively too small to notice the expansion within our lifetimes. is there any kind of assumptions about the rate of expansion per 100,000 million miles?
Thanks
louie

Replies to this message:
 Message 34 by Rahvin, posted 01-03-2008 1:27 PM LouieP has replied

  
LouieP
Junior Member (Idle past 5841 days)
Posts: 12
From: Schererville, IN
Joined: 01-02-2008


Message 35 of 35 (445708)
01-03-2008 1:32 PM
Reply to: Message 34 by Rahvin
01-03-2008 1:27 PM


Re: the expansion
From what I understand, those distances are too small, and gravity is holding the bodies in our solar system together anyway.
The expansion is observed in the redshift of very distant stars, and the fact that the further distant the star, the more intense the redshift (so the more space is between two object, the more space is seen to expand. Like the balloon example above, two dots close together on an expanding balloon will move apart more slowly than two dots farther apart, because every square inch of the surface is expanding at the same time.
thank you for the timely response, I feel that i have a good grasp on what is occurring, or we assume is occurring, as we know an increase in knowledge can always change what we feel to be fact. i was definitely mainly wondering if there was some type of scale i could use even for my own purpose to simplify the extent of the expansion.
intriguing to me nonetheless.
thanks again

This message is a reply to:
 Message 34 by Rahvin, posted 01-03-2008 1:27 PM Rahvin has not replied

  
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