Across
- 5. the first telescopes that use lenses to bring visible light to a focus.
- 6. measures the intensity of visible light.
- 10. an unknown substance that does not give off light or radiation
- 14. the distance between peeks of a wave
- 15. separates light into different wavelengths and colors
- 16. cluster of galaxies that range from 5-30 millions light years wide
- 17. collects electromagnetic radiation from distant objects so an image of the object can be recorded.
- 18. early stage of a star and it beginning to rotate
- 21. powers the stars by the combination of two hydrogen atoms to create a helium atom
- 23. the release of energy in the form of waves of particles
- 26. explosion of stars do the collapse of matter and leads to a black hole or neutron star
- 27. pre star stage, a collection of gas and dust, a star nursery
- 28. small group of galaxies that are about 2 million light years long.
Down
- 1. left over dense core from a burnt out star
- 2. Radiation in from distant bodies throughout the universe
- 3. a graph that shows the relationship between a stars age, brightness, and temperature.
- 4. pull towards the center of an object
- 7. sent directly to foreign bodies to make close up observations.
- 8. displays different wavelengths of radiation
- 9. the number of waves that pass through a given point
- 11. bring visible light to a focus using mirrors
- 12. largest group of galaxies with the diameter of 100 million light years or more!
- 13. an extremely dense and small star that is very very heavy
- 19. Later stage of a star where it expands and is running out of hydrogen for fusion.
- 20. the densest thing that we know exist and its gravity is so strong that light cannot escape.
- 22. a collection of dust, stars, and gasses held together by gravity
- 24. ball of gas that gives off a massive amount of electromagnetic radiation through nuclear fusion
- 25. Late stage of a MASSIVE star (similar to red giant but bigger)