FRIHOST FORUMS SEARCH FAQ TOS BLOGS COMPETITIONS
You are invited to Log in or Register a free Frihost Account!


How bright would the night sky be if..





truespeed
The universe wasn't expanding?

Not only the night sky,would it brighten up the day sky? To what degree would it have affected life on earth?
kelseymh
truespeed wrote:
The universe wasn't expanding?

Not only the night sky,would it brighten up the day sky? To what degree would it have affected life on earth?


Please read up on Olbers' Paradox..
Mr_Howl
kelseymh wrote:
truespeed wrote:
The universe wasn't expanding?

Not only the night sky,would it brighten up the day sky? To what degree would it have affected life on earth?


Please read up on Olbers' Paradox..


Wow, that's something interesting that I've never heard of before. Thanks.
_AVG_
Olbers' paradox offers a good simple argument. Basically, if the universe is uniform and infinite (spatially and temporally) then the night sky would be blindingly bright (at the same level constantly). This refuted the Newtonian ideal of an infinite, static universe uniformly dense with stars.
This is actually what would happen if the universe wasn't expanding: if it is finite spatially then the brightness of the sky probably would vary depending on the sun's presence or absence. Otherwise if it is infinite spatially (and temporally) then probably the sky would be infinitely bright lol. I'm unsure about these claims so correct me if I'm wrong.
Radar
This is interesting. Thanks for the mention of the theory. I'm sure I've come across it before, but I appear to have forgotten it.

It's basically a physical version of Fermi's Paradox, come to think of it.
Related topics
beautiful
Aquastrike's Realm
Aliens - Myth or reality?
Wonders of the world
BLACK METAL
Astronomy - what do you have for a telescope and any comment
When Jesus was born...
Do you believe in Aliens ?
Night Sky (A Short-short story) Please Comment
Outrageous: Denmark re-publish Mohammud cartoons
Have you ever seen a UFO? Tell us about it!
What Religion are You?
Satellite Spotting
Comet C/2012 S1 (ISON) might be visible during the day!!
Reply to topic    Frihost Forum Index -> Science -> The Universe

FRIHOST HOME | FAQ | TOS | ABOUT US | CONTACT US | SITE MAP
© 2005-2011 Frihost, forums powered by phpBB.