Astronomy Crossword Puzzle

12345678910111213141516171819202122232425262728
Across
  1. 2. - It was believed to be in fixed position in the sky. However, when the Greeks traveled to places nearer the equator, like Egypt, they noticed that it is closer to the horizon.
  2. 6. - He was the greatest Italian scientist of the Renaissance. Due to the telescope, he was able to discover and observe important astronomical facts such as lunar craters, the phases of the Venus, the moon's of Jupiter, sun spots, and the sizes of the stars.
  3. 7. - Earth does this around the sun once a year.
  4. 9. - They are much noted for their contributions in different fields. They were not only great philosophers but great scientists and mathematicians as well.
  5. 10. - a dark (real image) area where light from light source is blocked by an opaque object.
  6. 11. - Any theory of the structure of the solar system (or the universe) in which earth is assumed to be at the center of it all.
  7. 13. - growing; describes the moon when the illuminated portion is descreasing.
  8. 15. - The perimeter of a circle or ellipse.
  9. 16. - An imaginary line through earth
  10. 17. - His accurate measurements of Mars were his greatest contributions to astronomy.
  11. 19. - A displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.
  12. 20. - A natural object that orbits a larger object.
  13. 22. - An obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination
  14. 25. - The astronomical model in which the earth and planets revolve around the sun at the center of the solar system.
  15. 26. - A moment when the sun's path in the sky is farthest south in the Northern Hemisphere or farthest north in the Southern Hemisphere.
  16. 27. - The longest day of the year. In the Northern Hemisphere it is in June, while in the Southern Hemisphere it's in December.
  17. 28. - Are three scientific laws describing the motion of planets around the Sun, by Johannes Kepler.
Down
  1. 1. - A student of Plato and considered as one of the great philosophers of his time; his earth-centered view dominated for almost 2,000 years.
  2. 3. - It is the shape of the earth and some other planets. It's is like a sphere squashed from the top so the diameter from pole to pole is less than the diameter from equator to equator.
  3. 4. - It claims that the planets moved in a complicated system of circles. This model also became known as the Ptolemic System.
  4. 5. - A representation of the sun-Earth-moon system.
  5. 8. - Developed and formalized Galileo’s concept of inertia.
  6. 12. - Earth’s path in space.
  7. 13. - shrinking; describes the moon when the illuminated portion is descreasing.
  8. 14. - A Greek philosopher who computed the circumference of the earth and who gave the most accurate size during their time.
  9. 17. - Discovered by Galileo to look at the moon, discover the four satellites of Jupiter, observe supernova, and discover sunspot.
  10. 18. - Dark region of the Sun due to lower temperature.
  11. 21. - Developed a heliocentric system where in the orbits were elliptical rather than circular. This advanced the Sun-centered view.
  12. 23. - Justified his Earth-centered model and explained retrograde motion through cycles and epicycles.
  13. 24. - The figure of the moon that appears as a curve with pointy ends.