I'm taking that first scene for what I think it was meant to be - we had no ship in Paradise Lost AND they didn't give us a reunion scene, in Meta there was ship but that was the we're-gonna-die kind and that's not as fun as just 'joking around' ship and then last week we had NO SG-1 at all!
I think it was meant to be some kind of 'Ok, we've acknowledged that we both may have died in the past few months, let's be silly and goof around' scene. It made absolutely no sense if you take it as a 'work' conversation, I mean come on! Why would O'Neill ask Carter about astronomy? He knows all of that stuff! He was just being goofy and she was playing along! It was cute and I enjoyed it. You also know that, in grand Stargate tradition, a scene like that ALWAYS comes before a possible love interest is introduced (see 'Cake' scene in Brief Candle, 'Crash and Burn' scene in Ascension etc. etc.).
Speaking of the love interest, I didn't like him from the moment I saw him and NOT because I'm a shipper! He just had this look that said 'weasel', I can't explain it. He actually reminded me of Alex from the British Big Brother series, maybe that's why I didn't like him (I detest reality tv! It's so BORING! Who wants to see a load of attention-seekers prancing around in their pyjamas and discussing chickens at 1am?!?) Every line that came out of Aiden's mouth was cheesy, to coin a phrase, 'The guy is a walking cliche!'!!! I can see why Sam was flattered, I mean she doesn't get praised by men in *that* way very often (OK, OK, so Jonas, Martouf, Orlin, Joe, Narim were all after her but look what happened to them!). Neway, I didn't trust the woman either, she seemed too much like a sneaky Bond girl to me!