When you wish upon a star, is it already dead? An astronomer crunches the numbers

The stars we can see in the night sky are a lot closer and live a lot longer than you would think.

The post was publish in first on this website : https://www.space.com/the-universe/when-you-wish-upon-a-star-is-it-already-dead-an-astronomer-crunches-the-numbers