
A combination
of the moon's SOLAR reflection...
The Big Bang Theory Season 1, Episode 2

...that's been traipsing around
the SOLAR system for billions of years...
The Big Bang Theory Season 2, Episode 4

may have discovered
a new planet in our SOLAR system?
The Big Bang Theory Season 9, Episode 16

If 65 billion SOLAR neutrinos pass
through a square centimeter every second...
The Big Bang Theory Season 8, Episode 19

Somewhere beyond our SOLAR system.
The Big Bang Theory Season 8, Episode 6