Constellations Quiz

3. the astronomical equivalent of longitude
6. a constellation that never sets below the horizon as viewed from a location on earth
8. the center of mass of two or more bodies that orbit one another
13. the use of constellation where sailors has to use the stars to find their way across the sea
14. the swan
15. the brightest star in the night sky, belonging to a constellation canis major

1. the point on any given observer's celestial sphere that lies directly above him
2. the brightness the star would have if all stars were the same standard distance from earth
4. most abundant element in the universe
5. a reaction through which two or more light nuclei collide to form a heavier nucleus
7. the greek astronomer who catalogued a total of 48 constellations of ancient Greece
9. the study of everything in the universe beyond earth's atmosphere
10. measure of the brightness of a star or other celestial body
11. the great circle that is apparent path of the sun among the constellations in the course of the year
12. an apparent change in the position of an object caused by a change in the position of the observer