1. MMSA Earth-Space Science

2.  Huge spheres of glowing gas  Composed primarily of hydrogen  Produce energy by nuclear fusion. Atomic nuclei join together in the star’s core What happens when two H atoms fuse? Release of a large amount of energy Same process which powers the H-Bomb

3.  Medium and smaller stars produce Helium  Larger (more massive) stars produce heavier elements

4.  Color  Temperature  Size  Composition  Brightness

6.  Distance: Parallax  Chemical composition: spectroscopy  Mass: Gravitational effects  (Solar Mass = 10 30 kg)