1. Life Cycle of a Star
Jessica , Nicole, Oriana

2. Lesson Today we will talk about the Life Cycle of a Star:
How stars are formed
Life cycles of different stars.
How different stars die
We will use an example to show key features of the cycle.
How to read and understand the HR diagram.

3. Red Star Smallest of all the stars Most common star Longest life span
Dimmest star
Coolest star

4. Yellow Star Second most common star Our Sun is a yellow star Average
Lifespan
luminosity
Temperature

5. White Star Larger, less common star Shorter lifespan
Ends in a supernova
Brighter and hotter

6. Blue Star Hottest and brightest star Shortest life span Least common
Ends in a supernova and becomes a black hole

7. The HR Diagram

8. Life Cycle of a star
Nebula -> protostar-> main sequence-> red giant-> white dwarf OR
Nebula -> protostar-> main sequence->red supergiant-> supernova-> black hole

9. Citation http://apod.nasa.gov/apod/ap121220.html