Number of atoms in the universe

 Not found

There may be a page that does state this theoretical number, but it's not easy to find

The number is estimated to be 10 to the 80th power

or

10^82

It depends on who you ask

Anal Babes (band), Adam Thrasher, Spacemoose and Yavin 4

I found the Anal Babes (NFOW) on Adam Thrasher's old web page, which also isn't found on Wikipedia.  While those are both "real things", a band and a person,  which either exist or did exist, you will not find an article about them on Wikipedia.

Articles for Spacemoose and Yavin 4 are both found, but neither actually exist, they are just creations of real people, who do exist. 

It's just one of those strange things about Wikipedia, made up "things" that have no actual existence have huge articles, while actual people or things are not found.  And will never be found.  This is not by chance, or neglect.  There is an active and constant effort, energy and actions being taken by unknown or known people, to remove and prevent articles from existing on Wikipedia.

Both examples, Anal Babes and Adam Thrasher, will not be allowed to exist on Wikipedia.  

While a cartoon that long ago vanished from the internet, and a fictional moon from the Star Wars franchise both have extensive articles.

It's one reason why I find making blog posts here so much fun.  Creating articles about actual people, places and things, that are real. An enjoyment you can never have on Wikipedia.  Which means "that" is also something not found on Wikipedia.  

Wow.  So meta.

The Anal Babes links

https://analbabes.bandcamp.com/track/intro-fuckstuck

https://www.discogs.com/artist/505754-Anal-Babes

https://analbabes.bandcamp.com/album/people-are-garbage

https://www.youtube.com/watch?v=T_mBhrgH69k&list=PL93aTp21n90iOaGvZqgwUgdQuHPNtXmPw full album

Live at Bromsjordet in Horten (Norway) 1992 

Gene Ray or Otis Eugene "Gene" Ray, the author of the Time Cube Theory

 Gene Ray, inventor and author, American self-described scientist and creator of the Time Cube Theory

RIP

While his "theory", the Time Cube,  (something that is not real) has an extensive article, the actual person, Gene Ray, (who did exist) is not allowed to have an article on Wikipedia.  (he does however, have an article on Wikiquote)

In this matter, it is almost exactly like how Bernhard Hugo Goetz is not allowed an article on Wikipedia.

Baby Holly (found and living in Oklahoma)

 They used DNA and found her

Extra links if you never heard of the Christ Family, or Lightning Amen

https://www.newspapers.com/article/corpus-christi-caller-times-lightning-am/134626242/?locale=en-US

https://web.archive.org/web/20170828161212/https://www.washingtonpost.com/web/20170828161212/https://www.washingtonpost.com/archive/local/1980/05/01/jesus-return-claimed/6f5e70f6-8acf-4f4b-a85c-5593246485fb/?utm_term=.e28a82c6eb72

https://www.reddit.com/r/TrueCrime/comments/v8h2sv/42_years_later_a_murdered_texas_couples_missing/