Metric vs. other measurement systems - chart

[hemmjo]

Snip...

—would suffice to calculate the circumference of the known universe to the width of a hydrogen atom. (That number is rounded, for those of you keeping track.)... Snip

Assuming of course that the universe was round and had some comprehensible and definable limit.

[mklotz]

Assuming of course that the universe was round and had some comprehensible and definable limit.

The "KNOWN universe" is defined by the greatest distance to which we can see with our current technology. It is a radius and associated with that radius is the geometric notion of a circumference. It is that circumference to which the quote refers, not the as yet unknown boundary of the universe, if indeed one exists.

The most puzzling issue to me revolves around the fact that the universe is expanding. Into what is it expanding ? The question is as mind contorting as speculation of the origin of the big bang.

[Frank S]

The "KNOWN universe" is defined by the greatest distance to which we can see with our current technology. It is a radius and associated with that radius is the geometric notion of a circumference. It is that circumference to which the quote refers, not the as yet unknown boundary of the universe, if indeed one exists.

The most puzzling issue to me revolves around the fact that the universe is expanding. Into what is it expanding ? The question is as mind contorting as speculation of the origin of the big bang.

I heard there is a good resterauant at the edge of the universe

[neilbourjaily]

I heard there is a good resterauant at the edge of the universe

Good to know 'cause there ain't no good restaurants around here.