Across
- 5. bright and cool
- 8. increases as you get closer to the origin on an hr diagram
- 10. measures the stars brightness as if it were at a standard distance away
Down
- 1. luminosity
- 2. tells us how bright an object appears from Earth
- 3. stars are classified by their spectra(the elements that they absorb) and their temperature
- 4. dim and hot
- 6. small and cool, red, low bright and temp
- 7. older stars can be red or blue
- 9. when a star is considered middle age;e.g. Sun