1. Stars

2. Betelgeuse

3. Rigel

4. Blue/White Star

5. The Sun

6. Composition of Stars Spectrum – a rainbow of made of millions colors.
Spectrograph – an instrument used to spread starlight out into colors.
Emission lines – bright lines made with certain wavelengths of light.
Absorption spectrum – a continuous spectrum with dark lines where less light gets through.

7. Emission Lines

9. Magnitude (brightness)
Apparent magnitude – how bright a light looks or appears.

10. Magnitude cont’
Absolute magnitude – is the actual brightness of a star.

11. Orion

12. HR- Diagram
The HR-Diagram is a graph showing the relationship between a star’s surface temperature and absolute magnitude.

13. HR-Diagram

15. Binary Systems

16. Binary System

17. Supernovas

20. Neutron Stars

23. Pulsars
pulsar sound

24. Black holes

25. Black holes cont’