Components of the Universe Vocabulary

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Across
  1. 2. this galaxy has no particular shape and are full of gas and dust with a lot of star formation going on within them.
  2. 4. last stage of a massive star's life this occurs as the star runs out of nuclear fuel and some of its mass flows into the core.
  3. 6. the range of wavelengths or frequencies over which a certain radiation extends
  4. 7. make up majority of stars on the H-R diagram these stars can range from bright and hot to dim and cool.
  5. 11. a vast open space which contains all the matter and energy in existence. Contains all of the galaxies, stars, nebulae, and planets. Still expanding outward as a result of a violent, powerful explosion that occurred about 13.7 billion years ago known as the Big Bang.
  6. 12. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
  7. 14. the actual brightness of a star
  8. 15. the stage in a star's life cycle that occurs after the main sequence stage for only small to medium mass stars.
  9. 17. huge, hot, brilliant balls of gas located trillions of kilometers away from Earth.
  10. 18. the galaxy that contains our Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye
  11. 19. a graph that shows the relationship between a star’s surface temperature and it’s absolute magnitude or luminosity (brightness).
  12. 20. a rocky mass that orbits the sun.
  13. 22. the smallest and coolest kind of star on the main sequence.
  14. 23. an apparatus for producing and recording spectra for examination
  15. 24. this galaxy is made of mostly old stars, shaped like stretched circles and do not have much gas and dust.
Down
  1. 1. the core left behind after a supernova.
  2. 3. a cloud of gas and dust in space made primarily of hydrogen and helium.
  3. 5. a rock that survives its passage through the earth's atmosphere such that part of it strikes the ground.
  4. 8. a stage in a star's life cycle that occurs after the main sequence stage for only high mass to extremely high mass stars.
  5. 9. the stage in a star's life cycle that occurs after a giant star stage. A dense, planet-sized star that has exhausted all of its nuclear fuel.
  6. 10. forms when very massive stars collapse at the end of their life cycle. A large area in space with a very strong gravitational pull.
  7. 13. this star is currently in the main sequence is a yellow dwarf star, and is considered to be middle aged and has been in existence for approximately 4.3 billion years.
  8. 16. a galaxy that has stars, gas and dust that are spread outward from the galaxies center and contain a lot of gas, dust and newly forming stars.
  9. 21. a rock that burns and vaporizes upon entry into the Earth's atmosphere.