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Planetary Science Vocabulary #2 1. Asteroids Objects made of rock, metal, and ice that are much smaller than planets Most are found between Mars and Jupiter 2. Comets Large, icy objects that have a long, narrow orbital path around the sun 3. Craters Bowl-shaped depressions of various sizes on the Moon’s surface 4. Crescent Moon phase when less than ! of the side facing Earth is illuminated 5. Eclipse Occurs when object in space casts a shadow on another object 6. Full Moon phase when the entire side facing Earth is illuminated 7. Gibbous Moon phase when more than ! of the side facing Earth is illuminated 8. Lunar Eclipse Sun, Earth, and Moon are exactly lined up so that the Earth is in the middle and casts a shadow on the Moon CAN ONLY OCCUR DURING A FULL MOON 9. Meteor Piece of rock from space that creates a bright streak of light across the sky as it burns in the Earth’s atmosphere AKA: Shooting Star 10. Meteorite Piece of rock from space that makes it through Earth’s atmosphere and lands on Earth 11. Meteoroid An object, such as a rock, traveling through space 12. New Moon phase when the side facing Earth cannot be seen because it is not illuminated 13. Rays White lines that extend in all directions from a crater 14. Regolith Lunar soil on the moon’s surface Moon Dust 15. Solar Eclipse The moon is between the Earth and Sun and casts a shadow on the Earth CAN ONLY OCCUR DURING A NEW MOON 16. Tides Changes in the ocean water levels that take place in a regular pattern; controlled mostly by the pull of gravity between the Moon and Earth 17. Waning Illuminated surface of the Moon as seen from Earth is decreasing in size 18. Waxing Illuminated surface of the Moon as seen from Earth is increasing in size