Wrong, stars actually have no solid mass and it were to have burned out, the gases would have collapsed and condensed together forming a very dense ball of matter called a black hole, i am an amateur astronomer.
Actualy all stars do not have to form a black hole. Some stars like our own do not have a big enough mass/ and or are to small and will not form black holes but will simply condense into a very small but dense white dwarf. Amateur...
And by the way, why does this map have a huge picture of the Andromeda Galaxy in the sky? It is literally light years away, it appears to be a bright star in the night sky, not a huge full picture.