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RE: What If The Sun Were A Ping Pong Ball?
If the Sun were shrunk down to the size of a proton then the size of the Observable Universe would be about 1.1 km if I did not screw up my math.
We are pretty frickin small.
Congratulations on reaching a reputation of 50 BTW.
Do you believe in the matter anti-matter thing? (if a missed article, link to it pls.)
Yes. Anti-matter is a thing but it is really is not as mysterious as science fiction makes it out to be.
It has been known to exist since at least 1932:
https://en.wikipedia.org/wiki/Antimatter
.