Across
- 1. When the moon is closest to Earth, the moon is at ____________.
- 4. Natural satellites around planets
- 5. The name of the first artificial satellite launched into space
- 7. The inner portion of an eclipse in which sunlight is completely blocked
- 13. A darker area of the moon that is smooth and reflects less light
- 15. Occurs when one celestial body passes through the shadow of another
- 16. A day in which the sun is as far north or as far south of the equator as possible giving us the longest and shortest daylight hours of the year
- 18. A region between the orbits of Mars and Jupiter that contain most asteroids in our solar system
- 19. A small body of ice, rock, and cosmic dust that follows highly elliptical orbits around the sun
- 20. The planet that is sometimes referred to as Earth's twin which also has the highest surface temperature in the solar system
- 23. Planetlike objects that circle stars other than Earth's sun
- 25. Any object that orbits the sun, is round because of its own gravity, has not cleared the region around its orbit, and is not a satellite of another planet
- 27. Another name for the outer planets because they are large planets that have deep, massive atmospheres made mostly of gas
- 28. The largest of the minor bodies in the solar system that are fragments of rock that orbit the sun
- 30. A bowl-shaped depression on the surface of the moon
Down
- 2. A day in which the hours of daylight and darkness are approximately equal everywhere on Earth
- 3. The Red Planet
- 4. A very small body of rock or metal that moves throughout the solar system; most have a diameter of less than 1 mm
- 6. The varying shapes of the moon, lighted by reflected sunlight
- 8. The largest planet in the solar system
- 9. The outer part of the shadow of an eclipse in which sunlight is only partially blocked
- 10. Another name for the inner planets because they are similar to Earth
- 11. Any part of a meteoroid that is left when a meteoroid hits Earth
- 12. The planet which has the solar system's strongest winds and is named after the Roman god of the sea because of its water-like color
- 14. The bright streak of light that is produced when meteoroids begin to burn up after entering Earth's atmosphere
- 16. The least dense planet in the solar system whose distinctive feature are its rings, which are two times the planet's diameter
- 17. The only known planet that has the proper combination of water, temperature, and oxygen to support life
- 21. A region of the solar system that starts just beyond the orbit of Neptune and contains dwarf planets and other small bodies made mostly of ice
- 22. When the moon is farthest from Earth, the moon is at ____________.
- 24. The planet whose distinctive feature is that its axis of rotation is almost parallel to the plane of its orbit
- 26. A body that orbits a larger body
- 29. The planet closest to the sun that has a large daily temperature range due to its slow rotation and absence of a significant atmosphere