39 reputation
3
bio website photos.beilby.com
location Perth, Western Australia
age 47
visits member for 2 years, 1 month
seen Sep 29 '12 at 10:14

Veterinary surgeon, conservationist, humanitarian, photographer, fitness/martial arts fiend, lifelong learner.


Sep
29
answered Messing with the past: Endless loop, or alternate timelines?
Sep
28
awarded  Autobiographer
Sep
27
awarded  Supporter
Sep
27
answered How long does it take for expanding space to double in size
Sep
26
comment The radius of the universe and time
In GR, Einstein had no understanding of the universe expanding at all. I understood the notion of our universe being the skin of a 4D sphere was a fairly well accepted concept (either that or a 4D torus). Is this not the case? Your 1D universe analogy has expansion/contraction within that dimension that you describe as intrinsic curvature. Of course if that length of elastic was curving out in a second dimension the ant would still see simple expansion even though the distance between the start and end points hadn't changed (in 2D). Is the radius of our universe the metric we see as time?
Sep
26
comment The radius of the universe and time
Ok - I did get excited and throw in too many questions and concepts to begin with. I would like to re-clarify - Can you show me how time is not the radius of the universe? Can we be sure the dimension we see as the unidirectional passage of time is not simply the space through which the universe expands?
Sep
25
asked The radius of the universe and time
Sep
20
awarded  Teacher
Sep
19
answered Measure absolute speed