# Thread: Big bang singularity size

1. hello everyone

like the prevailing theory now on how our universe origin has taken is THE BIG BANG.

BUT i am studying in 11th and one of my lecturer told me that our universe when exploded from the big bang singularity it's size was 10^-36 m
any idea on that? like how scientists calculated that value you can find this at this website UNIVERSE.  2.

3. The "size" of a singularity is, by definition, zero (as far as I understand it). I'm not sure anyone thinks this represents a real thing.

The size you quote must be the size of the observable universe at some early time. The earliest we can go back is, I think, about 10-36 seconds after time zero - our current theories of physics probably no longer apply before then. So, I guess that might be where size comes from.  4. but we all know the least measurable part of a time and that is the planck time which is 5.4 *10^-44 = 0.0000000000000000000000000000000000000000000054 "SECONDS".

nice possibility there you've considered strange,but 10^-36 sec's after time zero is much greater than planck time so what could be the other possibilities?  5. Originally Posted by dheeraj so what could be the other possibilities?
Other possibilities for what? Our current theories are not able to extrapolate back much earlier (and certainly not back to Planck scale).
Chronology of the universe - Wikipedia, the free encyclopedia  big bang theory, calculation, scientists, singularity, size 