Because it was deep space. (the joke is how the outer space was very deep)
Amble in (Anne Boyeyn) I made this joke up and am very proud of it
The posters
X-post) http://www.reddit.com/r/AskHistorians/comments/2krnv8/whatistheoldestjokewehaveonrecord/
Some people may call it a log journal, while others call it a diary-a.
You planet.
You plan-et.