‘Constellations’ charts and recharts our stars

When lives change course in TheatreWorks’ “Constellations,” it’s not just because of the usual suspects — a doctor’s prognosis, the response to a marriage proposal. Joke too coarsely or guard your feelings too closely, just once, and that potential relationship never blossoms. Deliver a piece of news with venom instead of tenderness, and you spark an argument from which you can never go back.

In Nick Payne’s boy-meets-girl story, seen Tuesday, Sept. 5, at Mountain View Center for the Performing Arts, cosmologist Marianne (Carie Kawa) and beekeeper Roland (Robert Gilbert) have endless chances to get things wrong.