Intro to Science

1234567891011121314151617181920
Across
  1. 2. A smaller body that orbits a planet.
  2. 4. The process by which nuclei of small atoms combine to form a new, more massive nucleus; the process releases energy. (2 words)
  3. 8. An optical instrument designed to make distant objects appear nearer.
  4. 10. The path of a celestial body or an artificial satellite as it revolves around another body.
  5. 11. A spherical body that orbits the sun.
  6. 12. The name given to 2 probes launched by NASA to study outer Solar System and eventually interstellar space.
  7. 14. A telescope orbiting Earth that was launched in 1990.
  8. 15. A mixture of gases that surround a planet moon or space object.
  9. 16. A large celestial body that is composed of gas and emits light.
  10. 17. A galaxy that does not have a regular shape, like a spiral or an elliptical galaxy.
  11. 19. A small galaxy that contains as few as 100 million stars.
  12. 20. A large collection of stars, gas, and dust that is held together by gravity.
Down
  1. 1. A collection of large and small bodies that orbit our central star, the sun. (2 words)
  2. 3. A large galaxy that contains hundreds of billions of stars.
  3. 5. Space and all of the energy and matter in it.
  4. 6. A galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless brightness profile.
  5. 7. A group of 10 or more galaxy clusters.
  6. 9. A dense concentration of galaxies.
  7. 12. Empty areas in space.
  8. 13. A galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms.
  9. 18. A force of attraction between objects that is due to due to their masses.