Stellar Distance

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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 starís 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.