George Bailey promising you the moon? Forget that hack, Carl Sagan promises you the entire universe for humanity to explore.

Sagan may be best known for his contributions to astronomy and sparking excitement about space and science in the hearts of many who watched Cosmos or read the passionate words he put into books, but a little known fact about him is that he also gave future generations a host of smooth lines with which to melt the hearts of their beloved. What a guy!