Across
- 5. when we have equal hours of day and night over the equator
- 6. when a planet moves around another object like a star
- 8. model of the solar system with the earth at the center and the sun and other planets revolving around it
- 11. occurs when we have syzygy, or the Sun, Moon, and Earth are in a straight line
- 14. darkest part of the shadow of a eclipse
- 20. occurs when the moon's shadow falls on the moon
- 21. dirty iceball that orbit the Sun, has 2 tails that form and are longest when closest to the sun
- 22. rocky bodies that travel through space, usually concentrated between Mars and Jupiter
- 25. usually June 22nd, when we have the most hours of daylight in a day
- 27. when a planet spins on its axis
- 28. force that if an object is in motion, it wants to stay in motion, and if an object is at rest, it wants to stay at rest
- 30. force that attracts one object to another
- 32. occurs when the moon and the sun are at a 90* angle
- 33. four outer planets are known as this
- 35. when moon's light increases, these phases are lit on the right side of the moon
- 36. path that planet takes during revolution
- 37. moon that we cannot see in the sky, when moon is between the earth and sun
Down
- 1. band of astroids between Mars and Jupiter
- 2. moon that we see fully illuminated, when moon and Sun are at opposite sides of Earth
- 3. Mercury, Venus, Earth, and Mars are considered this. located closest to the sun with a rocky surface and higher density
- 4. Usually December 21st, when we have the least hours of daylight in the northern hemisphere
- 7. spherical cloud surrounding solar system where many long period comets originate
- 9. band in outer solar system past Neptune where many comets are found
- 10. shape of moon that is more than half, but not fully lit
- 12. the shape of Earth's orbit
- 13. shape of moon that is like a banana, or a sliver of light
- 15. a meteor that is traveling through space
- 16. process of combining atoms, releasing a lot of heat and light energy
- 17. model of the solar system with the sun at the center and planets revolving around it
- 18. current hypothesis for how the moon formed
- 19. partial shadow occuring during an eclipse
- 23. occurs when earth's shadow falls on the moon
- 24. meteoroid that survives trip through atmosphere and hits the ground
- 26. dark spots on the moon
- 29. meteoroids that enter Earth's atmosphere and burn up from the friction
- 31. when moon's light decreases, light leaves on the left side
- 34. light spots on the moon