Across
- 3. invisible line between the north and south poles; the Earth rotates on this
- 5. first man to walk on the moon
- 7. "red planet" because of iron oxide, two moons-Phobos and Deimos
- 10. 1920's-focused on "fuzzy patch" and discovered another galaxy
- 14. a ring of asteroids between Mars and Jupiter
- 15. largest planet, several small rings, great red spot
- 17. two days a year when the day and night hours are equal
- 19. first AMERICAN in space
- 22. when the Earth, Moon, and sun line up and one blocks the another (solar or lunar)
- 23. the only star in Earth's solar system
- 24. the alternate rising and falling of the sea
- 25. demoted in 2006 to a dwarf planet, one moon-Charon, -375* is one of the coldest places in the solar system
- 28. first planet, fastest orbit, greatest temperature RANGE
- 29. hottest planet because of sulfuric acid atmosphere, day longer than year
- 30. Late 1500's-Earth centered universe where all objects orbit the sun, but the sun and moon orbit Earth
- 31. methane atmosphere, rotates sideways, only planet named after a Greek god, several small rings
- 34. 1543-Polish astronomer who believed the Sun was the center of the universe and the planets orbited in circles
- 35. 2026 mission that returned to orbit the moon since 1972 carrying four astronauts
Down
- 1. planet with the most spectacular rings
- 2. 1609-after Brahe died, announced Laws of Planetary Motion-all planets orbit the sun in ellipses
- 4. space shuttle that exploded upon reentry in 2003
- 6. 1609-first person to use a telescope to observe objects in space
- 8. longest day of the year in summer and the shortest day of the year in winter
- 9. a meteoroid that has entered Earth's atmosphere
- 11. strongest winds in the solar system, several faint rings, Roman god of the sea
- 12. first woman in space
- 13. 140 A.D.-Egyptian astronomer, mathematician, and geographer who said the Earth was the center of the universe
- 16. name of the first GROUP of NASA astronauts
- 18. first man in space
- 19. a rocky or metallic body that orbits the sun in "belts"
- 20. space shuttle that exploded after liftoff in 1986
- 21. a chunk of rock or dust in space
- 26. loose collection of ice, dust, and small rocky particles, "long-haired star"
- 27. 1687-explained that gravity kept planets orbiting the sun and moons orbiting planets
- 32. first artificial satellite in space
- 33. a meteoroid that has hit Earth's surface