Across
- 2. The increase or decrease in frequency of sound or light waves as the source and observer move toward or away from each other
- 6. Stars do this in their core, taking Hydrogen and turning it into Helium
- 8. the number of waves that pass during a set amount of time
- 10. the length of a wave from peak to peak or trough to trough
- 11. Large spheres of plasma held together through gravity
- 12. a graph that categorizes stars by temperature and brightness
- 14. The further away an object is from us, the faster it is moving
- 15. Studies how EM waves interact with atoms and molecules
- 16. stars outer layers are blasted away
Down
- 1. Spectrum that contains all wavelengths of light
- 3. how bright the star would be if it was 10 parsecs away from the earth. Also can be thought of as a stars true brightness.
- 4. the distance between the earth and the sun, used to measure meadium distances in space
- 5. the distance light travels in 1 year
- 7. Objects that are moving away from us in space have their EM wavelengths stretched, making the light appear redder.
- 9. a cloud of gas and dust is space where stars are formed
- 13. a collection of interstellar matter and stars held together by gravity