Space exploration - Topics 2 and 3

1234567891011121314151617181920212223
Across
  1. 2. Spectrum produced when you heat a solid, liquid or gas and the light passes through a cooler gas (dark lines between colors)
  2. 5. Device that produces a focussed spectrum
  3. 9. Dark or bright lines observed in the spectra of stars
  4. 13. Shorter wavelength part of the spectrum
  5. 14. A __________ diameter objective lens is what increase a telescope's resolving power
  6. 15. Large lens at the front of the telescope
  7. 16. Universal gravitation - When no forces act on an object, it will move in a __________ line at a constant speed
  8. 17. Spectrum produced when you heat a gas at low pressure (bright lines on a black background)
  9. 20. Universal gravitation - Planets are always ________
  10. 23. Scientist that proposed and developed the 3 different types of spectra
Down
  1. 1. Eyepiece through which you view magnified objects
  2. 3. Dutch spectacle maker who invented the telescope in 1608
  3. 4. Model of the universe that Galileo supported
  4. 6. Universal gravitation - Force of gravity pulls planets towards the ______
  5. 7. Effect produced when the frequency of a wave changes as the source of the wave and the observer are moving toward or away from each other (Sheldon)
  6. 8. Universal gravitation - There is a __________ force between all objects
  7. 10. Spectrum produced when you heat a solid, liquid or gas at high pressure (contains all the colours of the rainbow)
  8. 11. Longer wavelength part of the spectrum
  9. 12. To build a more powerful telescope you need to increase this power
  10. 18. Device used to magnify objects at great distances
  11. 19. Scientist who stated the law of universal gravitation
  12. 21. Universal gravitation - Due to gravity pull from the Sun, planets are always in _______
  13. 22. First name of Italian astronomer who improved the telescope