1. Stars

2. Colo r Tells us the temperature of the star Red-Coolest Yellow White-Hot Blue-Hottest The color of light can also tell us what the star is made of Using a spectrograph Compare the emission lines with known samples

3. Stars Brightness of the stars How come some stars don’t look as bright as they actually are? Absolute vs Apparent Magnitude Absolute magnitude is the brightness of a star if it were 32.6 light years from Earth Apparent magnitude is the brightness as seen from Earth

4. But how are stars born? The Life Cycle of a Star

5. Regular Stars (marathon runners)

6. Nebula Stage 1; the birth of a star

11. Main Sequence Star Stage 2; the star at “middle age”

14. Red Giant Star Stage 3; the star reaching retirement

17. Planetary Nebula (Stage 4)

18. Planetary Nebula

20. White Dwarf Stars Stage 5; Old stars die slowly

21. White Dwarf Stars Stage 5; Old stars die slowly Stage 4; Old stars die slowly

22. Red Dwarf Star Stage 5; some stars cool quicker

23. Brown Dwarf Stars Stage 5; another cooler, slow death

24. Giant Star (sprinters)

25. Nebula Stage 1; the birth of a star

26. Main Sequence Star Stage 2; the star at “middle age”

30. Red Supergiant Star Stage 3; a massive blue star retires early

31. Red Supergiant Star Stage 3; a massive red star retires early

34. Supernova Stage 4; sudden death, and super giant explodes

41. Neutron Star The leftovers of an ancient supernova (Stage 5)

45. Pulsar A spinning neutron star spews neutrons into space (Stage 5)

49. Black Hole The leftovers of a supernova recollect to become more massive than any other star

51. Black Hole (Stage 5)