It depends wholly on the age and size of the star in question. If they don't become black holes they become neutron stars, which sometimes end up close to one another and collide like these. They're called kilonovas, when that happens.

[ She tucks herself in and he leans over to kiss her forehead. This is a lovely, perfect sort of moment, and he shifts from watching the illusion to watching the light spill across the planes of her face. ]

The light from the stars we've seen has traveled so far through space to reach our eyes here in Thedas — or on any planet really — that the light itself that we see is actually in the past, instead of showing the stars in the present.