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