Interesting suggestion! I am a big fan of space and the name of the show makes you think SPACE, so yes maybe they could of included it more. I feel some talks with space graphics in the background would be brill

Space themes are all well and good as a generalization of the big bang theory, however i feel that their occupations and Sheldons social awkwardness makes a repetitive structure. i am a fan of all episodes, i think theyre brilliant, however a few episodes exploring different aspects of their lives will bring deeper character development