Sky Science Terms

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Across
  1. 3. The sun and all of the bodies - planets, satellites, asteroids, comets, etc. that orbit around it
  2. 7. Everything that exists: the earth, the sun, the moon, satellite, asteroids, all the galaxies and the space between them
  3. 9. Chunks of rock that vary in size. They orbit the sun between the orbits of Mars and Jupiter
  4. 10. The motion of a planet, satellite, or the sun around its axis
  5. 12. a bright star known as the North Star or Polaris, that appears in the northern hemisphere
  6. 13. When meteoroid enters the earth's atmosphere creating a streak of light
  7. 16. A man-made or heavenly body that orbits around a larger object
  8. 18. Bright stars grouped according to the patterns they make in the sky
  9. 24. Meteors that fall to the surface of the earth
  10. 25. A straight line that an object or body rotates around or seems to rotate around
  11. 26. Objects that send or give out light
  12. 28. The four hard rocky planets (Mercury, Venus, Earth, Mars) closest to the sun
  13. 29. The time it takes for the moon to go around the earth
  14. 35. The motion of a planet along its orbit around the sun
  15. 36. Objects that reflect light
  16. 37. Stars that form patterns but are generally part of a constellation
  17. 38. A phase in the moon's cycle where more than half of the moon, but not the entire face of the moon is illuminated
  18. 39. When the moon gradually becomes less illuminated from a full moon to a new moon
Down
  1. 1. When the moon moves in front of the sun, partially or completely blocking it
  2. 2. The area between the inner and outer planets that is filled with asteroids
  3. 4. The time it takes for the moon to complete all of its phases
  4. 5. When the moon grows gradually more illuminated from a new moon to a full moon
  5. 6. These rocks, usually not much bigger than grains of sand, may have been swept off asteroids or comets. They also orbit the sun, sometimes entering the earth's atmosphere
  6. 8. Once a year the sun reaches its highest and lowest points in the northern hemisphere
  7. 11. The name of the satellite that orbits the earth
  8. 14. constellations that are visible in the Northern Hemisphere throughout earth's revolution around the sun
  9. 15. The closest star to the earth, measuring more than a million kilometers away
  10. 16. A gaseous body that produces its own energy through nuclear fusion, releasing it as light and heat
  11. 17. When the moon moves into the earth's shadow preventing sunlight from falling onto the moon's surface
  12. 19. Large bodies that can only be seen by reflected light, as they revolve around the sun
  13. 20. A large ball of ice, dust, rock and gas that orbits the sun circling the dark edges of the solar system
  14. 21. An imaginary circle around the centre of the earth
  15. 22. The four giant gaseous planets (Jupiter, Saturn, Uranus, Neptune) that orbit the sun
  16. 23. Twice each year when the sun crosses the celestial equator, when day and night are of equal length
  17. 27. A cycle which the moon appears in different forms as it revolves around the earth
  18. 30. The study of the Universe and all bodies (stars, planets, comets, galaxies) that appear in the sky
  19. 31. a scale used to measure the brightness of stars and other objects in the sky
  20. 32. A spiral island of stars in space. Our galaxy is called the Milky Way
  21. 33. The time it takes for a planet to orbit all the way around the sun. It takes 365 days for the earth to orbit around the sun
  22. 34. The phase of the moon when less than half of the moon is illuminated