Space Unit Review

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Across
  1. 3. Planets that have a relatively small, dense core and are surrounded by massive layers of gas
  2. 5. Galaxies farther from us are moving away at a faster rate
  3. 6. The measure of how bright a star appears when viewed from a dark-viewing site on Earth
  4. 11. A magnetic storm on the surface of the Sun during which streams of charged particles are ejected into space
  5. 13. The measure of how bright a star would be if observed at a distance of 32.6 light years
  6. 14. A giant cloud of dust and gas in space
  7. 15. Used to determine the composition of a star by analyzing the spectrum and spectral lines of the star
  8. 16. Collection of objects that orbits the Sun
  9. 19. A collection of 100,000 to a million stars, found around the centre of the Milky Way
  10. 20. Launched into space to orbit a planet or a moon
  11. 21. Uses a lens to collect light from an object
Down
  1. 1. Uses a mirror to collect light from an object
  2. 2. A collection of stars, planets, gas, and dust held together by gravity
  3. 4. A body that could/will come together with many others under gravitation to form a planet
  4. 7. The widely accepted theory of the formation of the universe
  5. 8. Satellites that take 24 hours to complete one orbit
  6. 9. A star’s total energy output per second
  7. 10. Instruments used to detect electromagnetic radiation
  8. 12. Stars that are smaller in mass than the Sun and consume their hydrogen over 100 billion years
  9. 17. Galaxies that contain some of the oldest stars in the universe
  10. 18. Occurs when the light from a celestial body is blocked by the shadow of another object