...populating a gigantic COSMOS.
The Big Bang Theory Season 4, Episode 20
...on a surface located
at the farthest reaches of our COSMOS.
The Big Bang Theory Season 6, Episode 5
Do a good job and I'll tell you
Cosmo's ten dynamite tips
The Big Bang Theory Season 7, Episode 20
Peering through his telescope
at the birth of the COSMOS.
The Big Bang Theory Season 6, Episode 1