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
I Just Do Not Like Liars.

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Alexander on October 15, 2001 18:48:19 UTC

Those who claim being PhDs in physics while unable to calculate kinetic energy.

Gravity communication? Well, because gravitational waves (GW) move with c, there is no advantage in term of speed. (There is advantage in passing via huge masses without absorption hovever.)

The problem using GW is that they are VERY AND VERY VEAK (it has a mathematical reason - gravitational radiation is not a dipole like the electromagnetic one but a quadrupole radiation). We even can not detect radiation of spiraling neutron stars or black holes - events requiring energies equivalent to the rest mass energy of entire Sun burnt completely into gravitational radiation in a few seconds flash. (Imagine the RATE of energy conversion during these few seconds: E/t - it is even MORE than entire Milky Way galaxy light power). Yet we can not detect such "powerful" gravitational radiation by a sensitive detectors a few thousand light-years away.

So, gravitons carry so little energy that communication by them seems to be unrealistic.


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 1994-2020 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