Chapter 1 - What Is Astronomy?

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Across
  1. 2. an Italian scientist who is considered to be the first to use the telescope to look at the planets
  2. 6. a scientist who studies celestial bodies and how they exist and move in space
  3. 9. a heliocentric solar system has this at the center
  4. 11. early astronomers formed stars and groups of stars that form these
  5. 12. Modern astronomers can see details about stars and ________ that were not visible in ancient times.
  6. 15. early civilizations used the stars and movements of celestial bodies to measure this
  7. 16. this person reintroduced the heliocentric cosmos and confirmed the observations of Galileo
Down
  1. 1. We live in a _____________ solar system.
  2. 3. a telescope uses this to magnify distant objects
  3. 4. a constellation is a group of stars that fit together in the night sky to form this
  4. 5. this group of Babylonia used the phases of the moon to create the first lunar calendar
  5. 7. our calendar today is connected to the yearly and monthly orbits of the moon and this
  6. 8. The moon, planets, and stars are examples of what kind of bodies?
  7. 10. this is a modern tool astronomers use to study the planets and stars
  8. 12. Astronomers use chemistry and this other science to understand data.
  9. 13. the firs person to propose a heliocentric cosmos
  10. 14. An earth-centered universe is a ___________ cosmos.
  11. 17. in ancient times, people believed this was the center of the universe