Originally Posted by ApK
There is no particular reason that space should be the domain of the Air Force any more that it should be of the Navy, if it's going to be under the armed forces at all. An Air Force operates in the air, dependent on oxygen, gravity, etc, for it's planes to function. What's that got to do with space?
As I said above, it is going to depend on the time period and the theater of operation.
Near future, near-earth operations are going to be mostly USAF-style sorties.
Further out in both time and distance you'll get the dynamics of navy operations and culture asserting themselves. Even there, there are different navy cultures; submariner culture and carrier culture. For deep space exploration odds the carrier culture will likely be most useful as carriers are effectively floating cities and the Captain has to deal with a lot of interpersonal issues the AF, even a base commander, never gets to see.
Now, that doesn't mean the traditional Navy command structure will necessarily be adopted in real life. But the job descriptions are going to be a lot more Navy-ish.