Across
- 3. a celestial object that travels around a planet or a dwarf planet
- 5. (two words) the force of attraction between all masses in the universe
- 8. the path across the sky that the sun, the moon, the planets, and zodiac constellation appear to follow over the coarse of a year
- 10. a large, round celestial object that travels around a star
- 11. everything that exists including all energy, matter, and space
- 13. the angular height a celestial object appears to be above horizon; measured vertically from the horizon
- 14. a darkening of the celestial objects due to the position of another celestial object
- 16. the horizontal angular distance from north measured eastward along the horizon to a point directly below a celestial body
- 17. a huge, rotating collection of gas, dust, and billions of stars, planets, and other celestial objects
- 18. the scientific study of what is beyond earth
- 19. (two words)approximately 150 million km; the average distance from earth to the sun
- 22. the time of the year when the hours of daylight equal the hours of darkness
- 24. (two words) the imaginary sphere that rotates around Earth, onto which all celestial objects are projected
- 25. (two words)a celestial object that orbits the sun and has a spherical shape but does not dominate its orbit
- 27. the closed path or a celestial object or satellite as it travels around another celestial objects
- 28. a grouping of stars observed from Earth
- 29. producing and giving off light; shining
- 30. (two words) the sun and all the objects that gather around it
- 32. (two words) an orbital path directly over Earth's equator with a period of Earths rotation
- 33. a massive collection of gases, held together by its own gravity and emitting huge amounts of energy
- 34. (two words) the apparent motion of an object in the sky, usually a planet, from east to west, rather then the normal motion from west to east
- 35. (two words)low energy gas eruptions from the sun's surface that extend thousands of km into space
Down
- 1. the alternate rising and falling of the surface of larger bodies of water; caused by the interaction between Earth, the moon, and the sun
- 2. the changing direction of earths axis
- 3. an astronomical event that occurs two times each year when the tilt of Earth's axis is most inclined toward or away from the sun, causing the position of the sun in the sky to appear to reach its northernmost of the southernmost extreme
- 4. (three words) a group of satellites that work together to determine the positions of given objects on the surface of Earth
- 6. (two words)gases and charged by particles expelled above an active sun spot
- 7. (two words) the use of positions of stars to determine location and direction while traveling
- 9. (two words) all the phases of the moon
- 12. (two words)the range of wave lengths of (em) radiation, extending from radio waves to gamma rays, and including visible light
- 15. (two words) energy emitted from matter consisting of (em) waves that travel at the speed of light
- 20. a chunk of ice and dust that travels in a very long orbit around the sun
- 21. dark spots appearing on the suns surface that are cooler then the area surrounding them
- 23. (two words)the average distance between an object in the solar system and the sun
- 26. (two words) any object that exists in space
- 31. (two words)a display of shifting colours in the Northern sky caused by solar particles colliding with matter in the Earth's upper atmosphere