Planets of the Solar System

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Across
  1. 1. a squashed circle with two focus points or foci, planets orbit in an elliptical path
  2. 5. an imaginary line drawn around the earth equally distant from both poles, dividing the earth into northern and southern hemispheres
  3. 7. a small planet but lacking certain technical criteria to become a planet
  4. 11. the force of attraction between all masses in the universe
  5. 12. the mean distance from the center of the earth to the center of the sun.
  6. 15. a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure.
  7. 16. transfer of heat through fluid
  8. 18. a small rocky body orbiting the sun
  9. 20. the shadow cast by the earth or moon over an area experiencing a partial eclipse.
  10. 21. the star around which the earth orbits
  11. 25. have a progressively smaller part of its visible surface illuminated, so that it appears to decrease in size
  12. 26. The natural satellite of the earth
  13. 27. Comets are cosmic snowballs of frozen gases, rock and dust that orbit the Sun
  14. 28. the point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun.
  15. 29. a meteor that survives its passage through the earth's atmosphere such that part of it strikes the ground
  16. 30. the fully shaded inner region of a shadow cast by an opaque object
  17. 32. each of the four divisions of the year marked by particular weather patterns and daylight hours
  18. 35. a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere
  19. 36. relating to or belonging to a planet or planets
  20. 38. an optical instrument designed to make distant objects appear nearer
  21. 39. the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun.
  22. 41. A large body of matter in orbit around the sun or a star and thought to be developing into a planet
  23. 43. one that is getting larger each nigh
  24. 44. object's orbital motion around another object
  25. 45. the angular distance of a point north or south of the celestial equator.
Down
  1. 2. A celestial body moving in an elliptical orbit around a star
  2. 3. a small body of matter from outer space that enters the earth's atmosphere
  3. 4. A theory of the structure of the solar system in which Earth is at the center.
  4. 6. the action of rotating around an axis or center.
  5. 8. the angle between the plane of the earth's equator and the plumb line at a given point on the earth's surface
  6. 9. the collection of eight planets and their moons in orbit around the sun
  7. 10. the time or date at which the sun crosses the celestial equator
  8. 13. the point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun.
  9. 14. an eclipse in which the sun is obscured by the moon
  10. 17. A theory in which the sun is at the center of the solar system.
  11. 19. the angular distance of a place east or west of the meridian
  12. 22. the alternate rising and falling of the sea
  13. 23. a fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
  14. 24. a tide just after a new or full moon, when there is the greatest difference between high and low water
  15. 31. a robotic spacecraft that explores outer space
  16. 33. refers to a period of moderate tides when the sun and moon are at right angles to each other
  17. 34. The action or process of moving or being moved
  18. 37. It occurs when three celestial objects become aligned.
  19. 40. A force by which a planet or other body draws objects toward its center
  20. 42. the range of wavelengths or frequencies over which electromagnetic radiation extends.