History of Astronomy Crossword puzzle

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Across
  1. 4. LAWS Universal principles that govern physical phenomena.
  2. 7. A model where Earth is at the center of the universe.
  3. 10. A model with the Sun at the center of the universe.
  4. 11. MOTION The movement of planets around the Sun.
  5. 12. MOONS Four largest moons of Jupiter, discovered by Galileo.
  6. 13. Laws describing planetary motion using elliptical orbits.
Down
  1. 1. Ancient Earth-centered model of the universe.
  2. 2. ORBIT The shape of planets' paths around the Sun according to Kepler.
  3. 3. The farthest-traveling spacecraft, launched in 1977 to study the outer Solar System.
  4. 4. Three laws of motion explain the relationship between force, mass, and acceleration.
  5. 5. First astronomer to use a telescope systematically for celestial observations.
  6. 6. HUBBLE Astronomer who discovered that galaxies are moving away from us, proving the universe is expanding.
  7. 8. Astronomer who proposed the heliocentric model of the universe.
  8. 9. The apparent shift in position of a nearby star when viewed from different positions in Earth's orbit.