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ACROSS 1. A white ____ is an unusually small, dim star. 2. The temperature of a star can be determined by this. 4. These letters represent the spectral class of stars, from hottest to coolest. 8. A magnitude 2 star is ____ than a magnitude 3 star. 9. A red ____ is an unusually large, bright star. 11. Hot main ____ stars are bigger than cool main ___ stars. 12. ____ magnitude. How bright a star "really" is. The brightness of a star as seen from a distance of 10 parsecs. 14. The Greek letter delta (a triangle shape) denotes a ____ between two values. 15. A yellow star is ____ than a orange star. 16. ____ magnitude. The brightness of a star as seen from the Earth. |
DOWN 1. A magnitude 11 star is ____ than a magnitude 3 star. 2. A red star is ____ than a blue star. 3. The ____ to some stars can be measured by using parallax. 5. The apparent shift in a star’s position caused by the motion of the observer. 6. A general term that refers to brightness. 7. A small-mass star will last ____ than a large-mass star. 8. This phenomenon seen in the spectrum of a star indicates that the star is moving toward us. 10. This phenomenon seen in the spectrum of a star indicates that the star is moving away from us. 11. The ____ class (or type) of a star indicates its color and temperature. 13. 3.26 light-years. A star 10 of these away has an apparent magnitude (m) that is equal to its absolute magnitude (M). 15. ____ diagram. This chart shows the relationship between the spectral class (or color) of a star and its brightness. |