My girlfriend is overly obsessed with space to the point that’s all she talks about?

All she talks about is space and exo-planets and researches this kind of shit all the time.

she's a uni student studying astronomy so i get that it’s a part of her life but she’s so consumed with it?

how do i tell her to shut up without sounding like an ass hole

My girlfriend is overly obsessed with space to the point that’s all she talks about?
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