1. Act 1: Small or Medium Stars
Life Cycle of a Star
Act 1: Small or Medium Stars

2. Stage 1: Stellar Nebula
Particles collect in an increasing mass
Huge cloud of gas and dust spins and heats up
Results in increasing strength of gravitational attraction

3. Stage 2: Average Star (Main Sequence)
Produces its own heat and light from nuclear reactions between Hydrogen and helium

4. Stage 3: Red Giant
Increases in size
Hydrogen has been converted to helium
Helium is the fusion source for other elements

5. Stage 4: Planetary Nebula
The shell of the star is expelled and becomes planetary nebula

6. Stage 5: White Dwarf
Small, Hot, remnant of an average star

7. Act 2- Life cycle of Large Stars

8. Stage 1: Stellar Nebula
Particles collect in an increasing mass
Huge cloud of gas and dust begins to spin and heat up.
Results in increasing strength of gravitational attraction

9. Stage 2: Massive Star
Produces its own heat and light from nuclear reactions between Hydrogen and helium

10. Stage 3: Red Supergiant
Increases in size
Hydrogen has been converted to helium
Helium is the fusion source for other elements

11. One last burst of energy in large explosion
Stage 4: Supernova
One last burst of energy in large explosion
Has enough heat to use other elements as a new fuel source

12. Stage 5: Neutron Star
Force of gravity is GREAT
Incredibly DENSE, lots of mass
Small, not visible to the naked eye

13. Star Collapses in on itself and creates a black hole if large enough
Stage 5: Black Holes
Star Collapses in on itself and creates a black hole if large enough

15. Hertzprung-Russell Diagram
Classifies stars based on luminosity, temperature, and color
Plotted on the bottom axis according to increasing surface temperature
From left to right  hotter to cooler
Plotted on the left axis according to increasing luminosity
From bottom to top  less bright to brighter
Plotted on the top axis according to color
From left to right  blue to red