Chapter 26 Vocabulary

123456789101112131415161718
Across
  1. 3. / energy that might be causing accelerated expansion of the universe.
  2. 8. / telescope that collects and magnifies radio waves.
  3. 10. / is the galaxy that contains our Solar System. Its name "milky" is derived from its appearance
  4. 11. / study of how the universe began, what it is made of., and how it continues to evolve.
  5. 12. / cluster of about 45 galaxies, including the Milky Way
  6. 13. / the theory that the universe started with a big bang, or explosion, and has been expanding ever since.
  7. 15. / optical instrument that uses double convex lenses to concave mirror to collect light and magnify an image.
  8. 17. / device that disperses light into its component wavelengths, using a prism or diffraction grating
  9. 18. / light-emitting surface of the Sun.
Down
  1. 1. / giant star that has lost its outer layers, leaving behind a hot, dense core that continues to contract under gravity.
  2. 2. / star pattern that appears to form images, is used by astronomers to locate and name stars, and often is named for a mythological figure.
  3. 4. / large group of stars, gas, and dust held together by gravity; most commonly can be elliptical, spiral, and irregular.
  4. 5. / unseen mass that adds to the gravity of a galaxy, but cannot be detected or seen.
  5. 6. / section of an H-R diagram that is plotted from the upper left to the lower right and contains 90 percent of all known stars.
  6. 7. / optical instrument that uses double convex lenses to collect light and magnify and image.
  7. 9. / distance light travels in one year-about 9.5 km
  8. 14. / late stage in a star's life cycle that occurs when its hydrogen fuel is depleted, its core contracts, and its outer layers expand and cool.
  9. 16. / is a standard unit of mass in astronomy that is used to indicate the masses of other stars, as well as clusters, nebulae and galaxies.
  10. 17. / cool, darker areas of the Sun’s photosphere