1. Life cycle of a star
25.2

2. Low-Mass Stars
Nebula Protostar Star White Dwarf Black Dwarf
Medium Sized Stars
Nebula Protostar Star Red Giant Nova White Dwarf Black Dwarf
Massive Stars
Nebula Protostar Giant Star Red Supergiant Super Nova Neutron Star/Black hole

3. Terminology Nebula: A cloud of gas and/or dust in space
Protostar: a collapsing cloud of gas and dust destined to become a star (not engaged in nuclear fusion)
Red Giant: A large, cool star of high luminosity
Nova: a star that explosively increases in brightness (Also called a planetary nebula)

4. Terminology
Supernova: an exploding star that increases in brightness many thousands of times
White Dwarf: a star that has exhausted most of (or all) of its nuclear fuel and has collapsed to a very small size
Neutron Star: a star of extremely high density composed entirely of neutrons
Black hole: a massive star that has collapsed to such a small volume that its gravity prevents the escape of everything including light

5. Question of the day
What do stars the size of our sun become after a nova?
WWBAT: Describe the life cycle of a star

6. Homework Life Cycle of a Star Poster Pick one size of a star
Draw a picture to reference each step
Write a small description about each step
It must be colored