Across
- 3. a small rocky body orbiting the sun
- 6. the effect whereby the position or direction of an object appears to differ when viewed from different positions, e.g. through the viewfinder and the lens of a camera
- 7. a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun
- 9. an apparatus for producing and recording spectra for examination
- 12. a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 trillion miles)
- 15. the study of outer space
- 17. stars that make a picture
- 20. a planet’s only natural satellite
Down
- 1. move in a circle on a central axis
- 2. a star that explodes
- 4. 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
- 5. an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases
- 8. a cloud (hydrogen gas) in space
- 10. move or cause to move in a circle around an axis or center
- 11. a large astronomical body that is not a star or stellar remnant
- 13. a belief that stars control your life
- 14. a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy
- 16. a small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light
- 18. a huge ball of exploding gas
- 19. the curved trajectory of an object such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an object or position in space