Across
- 3. A vehicle for driving over rough terrain, especially one driven by remote control over extraterrestrial terrain.
- 5. _______ is a phenomenon in the northernmost and southernmost regions of Earth where night lasts for more than 24 hours
- 7. Any object that astronomers observe in outer space
- 8. _______ are experienced during different times of the year in the northern and southern hemispheres of Earth because these regions are tilted toward the Sun at different times of the year
- 9. The sun when seen at midnight during the summer in either the Arctic or Antarctic Circle
- 11. Happens when the Moon passes between the Sun and Earth, casting a shadow on Earth that either fully or partially blocks the Sun's light
- 12. The collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets. The planets of the solar system are (in order of distance from the sun) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune
- 16. The time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length (about September 22 and March 20).
- 18. An optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses, by which rays of light are collected and focused and the resulting image magnified.
- 22. The branch of science that deals with celestial objects, space, and the physical universe as a whole.
- 23. The nature of something's ingredients or constituents; the way in which a whole or mixture is made up.
- 24. A celestial body moving in an elliptical orbit around a star.
Down
- 1. A large artificial satellite used as a long-term base for manned operations in space
- 2. The envelope of gasses surrounding the earth or another planet.
- 4. An astronomical event that occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened
- 6. The recurring path of an object around another object in space
- 10. A vehicle or device designed for travel or operation outside the earth's atmosphere
- 13. In the northern hemisphere, _______ are referred to as the northern lights (aurora borealis).
- 14. Phases The different shapes of the Moon that we see at different times of the month
- 15. In a way that is repeated many times, always in the same order.
- 17. An unmanned exploratory spacecraft designed to transmit information about its environment.
- 19. The star around which the earth orbits.
- 20. Objects in space that orbit around another larger object. Natural ______ are celestial bodies. Artificial _______ are constructed and put into orbit by humans.
- 21. The time or date (twice each year) at which the sun reaches its maximum or minimum declination, marked by the longest and shortest days (about June 21 and December 22).