Back to Home

God & Science Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | God and Science | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: Re: Re: Re: Gravity Doesn't Exist?

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Alexander on January 25, 2001 03:14:21 UTC

Omega is NOT mass of matter versus mass of radiation, or mass of misbalanced matter versus all matter. What is called omega, is the following. If mass of the Universe is all we see, it will continue to expand forewer. If there were about 10 times more matter, the mass would be just enough to eventually slow down the expansion (so-called critical mass and devided by volume of Universe is called critical density). More mass would not only slow down but reverse the expansion. Anyway, the ratio of visible mass to the critical is what is called omega. Currently it is about 10-30% by various estimations (Omega = 0.1-0.3). And mass of radiation is included into omega, that is why scientists talk about possible "dark matter" out there.

And omega has nothing to do with misbalance between matter and antimatter in the early inflation era due to parity violation.

During evolution of BB almost all radiation was absorbed by matter, so we have very tiny fraction of Universe mass in light and in relic radiation (by the way, relic radiation is in fact visible light, but because it originated long ago, we see it from edges (or should we say, center) of Universe moving with speed extremely close to c away from us (or should we say, we are moving with almost c from that center). Red shift here is thus not few % but about mighty for orders ( 10^4), so the wavelength of that "relic flash" is blown by Doppler from visible submicron light to few millimeters, that is why we do not see it - it lost so much color (energy) that became radiowave. But any good radioscope sees it coming from afar in all directions.

light from stars is not coherent. Light from laser is.

Follow Ups:

Login to Post
Additional Information
Google
 
Web www.astronomy.net
DayNightLine
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2024 John Huggins All Rights Reserved
Forum posts are Copyright their authors as specified in the heading above the post.
"dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
are trademarks of John Huggins