Intro to Astronomy and Tools of Astronomy

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Across
  1. 2. The scientific study of the universe.
  2. 6. The glow in the sky from street lighting and other lighting that obstructs our view of the stars.
  3. 7. Approximate age of the universe
  4. 13. The distance between Earth and the Sun (approximately 150,000 km)
  5. 15. By studying objects like black holes, new planets, stars, and nebulas, scientists have learned more about the origin of the _______ and formation of the solar system.
  6. 17. The name for the type of light that has wavelengths that are slightly shorter than visible light and have frequencies slightly higher than violet light.
  7. 19. Besides our sun, the next closest star is ______ light years away.
  8. 20. Though all light travels at the same speed, different colors of light have different _____________.
  9. 21. Between 1969 and 1972, NASA landed _______ people on the moon.
  10. 22. The name for the type of light that has wavelengths that are slightly longer than visible light and have frequencies slightly lower than red light.
Down
  1. 1. the study of the origin, properties, processes, and evolution of the universe.
  2. 3. The bending of light by lenses.
  3. 4. An instrument that collects electromagnetic radiation from the sky and concentrates it for better observation.
  4. 5. The human eye can see only radiation of wavelengths in the _________________ range of the electromagnetic spectrum.
  5. 8. The giant explosion that formed the universe.
  6. 9. A type of telescope that collects only visible light. Two types are refracting telescopes and reflecting telescopes.
  7. 10. The ____ includes our sun, the 8 planets, and many smaller objects like moons and comets.
  8. 11. The galaxy that we live in.
  9. 12. The distance that light travels in one year (approximately 9.46 x 1012 km)
  10. 14. The first astronomer to use a telescope to view details about distant objects in the sky, like craters on the moon and that the Milky Way is made of stars.
  11. 16. A collection of stars, dust, and gas that are bound together by gravity.
  12. 18. All of the wavelengths of light including radio waves and X-rays.