Across
- 6. a sequence of stars on the Hertzsprung–Russell diagram, containing the majority of stars, that runs diagonally from the upper left to the lower right
- 7. the angular change per year in the direction of a star as seen from the Sun
- 8. a binary star in which the components are not resolved but whose binary nature is indicated by periodic variations in radial velocity, indicating orbital motion
- 9. a measure of the amount of light received by Earth from a star or other object—that is, how bright an object appears in the sky, as contrasted with its luminosity
- 10. an object intermediate in size between a planet and a star; the approximate mass range is from about 1/100 of the mass of the Sun up to the lower mass limit for self-sustaining nuclear reactions, which is about 1/12 the mass of the Sun
- 12. a low-mass star that has exhausted most or all of its nuclear fuel and has collapsed to a very small size; such a star is near its final state of life
- 13. an older system of measuring the amount of light we receive from a star or other luminous object; the larger the magnitude, the less radiation we receive from the object
- 14. the classification of stars according to their temperatures using the characteristics of their spectra; the types are O, B, A, F, G, K, and M with L, T, and Y added recently for cooler star-like objects that recent survey have revealed
- 15. the selection of sample data in a nonrandom way, causing the sample data to be unrepresentative of the entire data set
- 16. a star of exaggerated size with a large, extended photosphere
Down
- 1. a plot of luminosity against surface temperature (or spectral type) for a group of stars
- 2. the rate at which a star or other object emits electromagnetic energy into space; the total power output of an object
- 3. a binary star in which the plane of revolution of the two stars is nearly edge-on to our line of sight, so that the light of one star is periodically diminished by the other passing in front of it
- 4. motion toward or away from the observer; the component of relative velocity that lies in the line of sight
- 5. a binary star in which the two components are telescopically resolved
- 11. two stars that revolve about each other