[ sorry dean, castiel doesn't yet know you well enough to be playful with you; all he's given is the deadpan honestly, mostly because he doesn't have a read on dean yet, is keeping him at arms' length, where he keeps, well, pretty much everyone. it certainly doesn't help that he's feeling a little pandered to here, isn't accustomed to people like dean having any real interest in what it is that he does. ]

New exoplanets are discovered all the time, you know; we know of thousands of them. And Pluto has been classified as a dwarf planet, so take that as you will.

[ yes, dean certainly is being an ass, and castiel isn't sure how to read that grin that's cutting across his face, but he can't think to parse it as anything positive. he's a cautious creature by nature, and he's had time enough to adjust to the wicked distraction of dean winchester's - well, everything. so there's a suspicious slant to his eyes. ]

I wouldn't have thought you would have an interest in the heavens, Dean. "Cool" things are happening all around us, every day. Supernovas and stars collapsing, planets formed of burning ice, or diamonds, gamma ray bursts, clouds of dust that taste like raspberries.. take your pick.

[ one thing's for sure, though - asking about space is apparently a surefire way to get castiel to respond in any way that isn't clipped and monosyllabic. ]