The line that always cracks me up is "Uranus is gaseous."
 
Maybe someday, when I become a teenager, it won't be as funny. 

Uranus makes gas?

If they change Mars to Bowie, maybe they should change Uranus to Keef.

Would the first planet be changed to Freddie?

Funny you should mention parts of space being named after Bowie...

http://m.nydailynews.com/...owie-article-1.2500458

BassDaddy
Would the first planet be changed to Freddie?

Gosh, and this Fred has really gone to the dogs!

WOOF!

Moshkito

BassDaddy
Would the first planet be changed to Freddie?

Gosh, and this Fred has really gone to the dogs!

Diamond Dogs?

It occurs to me that David Jones has already been renamed David Bowie. So I would like to amend my suggestion about renaming the Roman god of war. Instead we should rename the planet Mars, Biggus Dickus, which was apparently the name or the war god before he changed it at the advice of his publicist.

Calling it Freddie really isn't renaming it.  It is just calling it by its first name.
 
Unless you are planning on referring to it as Freddy as in Freddy Krueger.