10 Questions What do you know about stars? Test your starry knowledge with this stellar quiz! AMNH_Official, 04/27/2018 answers Play How many stars are there in the Milky Way Galaxy? 200,000 200 million 200 billion Most stars form in tightly packed groups called: star clusters star huddles star formations A star's mass is the most important thing that determines: its temperature, luminosity, and color how it will live and die all of the above … and 7 more awesome questions! Check them out by clicking “Play”.