[So once upon a time, Barry Allen wanted to be an astronaut. He still wants to be an astronaut, but now that he's the Flash, it's become a secondary dream but it's still there. It's enough of a dream that it means he will totally drag Gemma with him to the planetarium just because he can.]

Did you know that while Polaris is the North Star for now, it won't always be? Due to the way the planet wobbles on it's axis, eventually the star will variate to a different one?