The Sun-Earth-Moon System
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ACROSS 1. Type of electric and magnetic radiation, or waves, that travel through space 3. The Moon's state of motion, in which its rotational and orbital periods are equal 6. "Spring" equinox 9. Earth's solstice position around June 21, at which the northern hemisphere has its maximum daylight hours 11. Closest point to Earth in the Moon's orbit 13. Type of eclipse that occurs when the Moon passes directly between the Sun and Earth 15. The portion of sunlight reflected by a planet's surface 16. Plane of the Earth's orbit about the Sun 18. Earth's solstice position near or on December 21, at which the northern hemisphere has its minimum daylight hours 19. Loose, ground-up rock on the Moon's surface 20. Material blasted out of impact craters on the Moon that falls back to the surface |
DOWN 2. Eclipse which occurs when the Moon passes through Earth's shadow 4. Valley-like structures on the Moon's surface 5. Inner portion of the Moon's shadow on Earth during a solar eclipse 7. Day characterized by day and night of equal lengths 8. Farthest point from Earth in the Moon's orbit 9. Longest or shortest days of the year 10. Dark, smooth plains on the Moon's surface 12. Type of telescope that uses mirrors to bring visible light to a focus 14. Type of telescope that uses lenses to bring visible light to a focus 17. Outer portion of the Moon's shadow on Earth during a solar eclipse |