metagalactic GPS

Eugene Leitl (
Tue, 8 Jun 1999 15:31:54 -0700 (PDT)

Spatial inhomogenities in the microwave background could be useful for ultra-deep-space navigation. Unfortunately, I have no idea how they change over long periods of time. Also, the observed Doppler shift (one hemisphere bluer, one redder) due to own movement gives one a global frame of reference for speed of travel.