Quasars, Stars and other objects
A Quasar is an extremely bright and distant active nucleus of a young galaxy with a compact halo of matter surrounding a central supermassive black hole. A star is a massive, luminous ball of plasma. A star shines because nuclear fusion in its core releases energy which traverses the star’s interior and then radiates into outer space. Almost all elements heavier than hydrogen and helium were created inside the cores of stars.