| A | B |
|---|
| red | color with the longest wavelength |
| blue-violet | color with the shortest wavelength |
| wavelength | related to the energy of light/radiation |
| gamma rays | shortest wavelength & highest energy |
| radio waves | longest wavelength & lowest energy |
| Doppler effect | determines if a star is moving toward or away |
| Spectrum of a star | chemical composition |
| Hubble Space Telescope | Not affected by Earth's atmosphere |
| Optical Telescope | gathers visible light/high resolution |
| Radio Telescope | operates 24/7, poor resolution/less expensive |
| Hydrogen | Most abundant element in the Sun. |
| Helium | Product of nuclear fusion |
| Solar wind | streams of electrons & protons from Sun's corona |
| 10 billion years | Average star's life expectancy |
| 4.6 billion years | Age of the solar system |
| 5.5 billion years | How much longer the Sun will exist |
| Nuclear Fusion | Powers the Sun & Stars |
| ultraviolet radiation (UV) | causes sunburns |
| Infrared radiation | form of EM humans feel as heat |
| red shift | stars moving away from Earth |
