Across
- 1. the brightness of a star is called ___ magnitude
- 3. what type of math do astromonoers use to find the actual distance to stars that are close to earth
- 6. an instrument used by astronomers to separate a star's light spectrum
- 8. __ differ in size, temperature, and color
- 9. the big dipper contains, only bright stars, only dim stars, or both?
- 11. a light year is the distance light travels in hour many years?
- 12. the brightest blue stars have an absolute value of negative ___
- 13. a light bulb gives off this type of spectrum
- 14. what color are the coolest stars?
- 15. class O stars are what color?
- 16. this is the band of colors produced when white light passes through a prism
- 19. Due to Earth's rotation, all of the stars in the sky make one complete ____ around Polaris every 24 hours
- 21. the ___ is one of many stars in the Milky Way galaxy
- 22. the actual motion of stars is hard to see because stars are so __
Down
- 2. the brightness of a star is ___ to the inverse of the square of the distance
- 4. these are the ____ stars in the sky, and are known as first-magnitude stars
- 5. scientist now classify stars using ___
- 7. ___ numbers represent dim stars
- 10. this is the most common element seen in the sun's spectrum
- 17. the apparent shift in the position of an object when viewed from different locations
- 18. every element has a ____ set of right emission lights
- 20. to learn what stars are made of, astronomers study the ___ from stars
- 23. the brightest star in the sky