Describe how astronomers measure parallax

Reference no: EM133476177

Question 1. Using one sentence each, describe how the following units of measure are defined:
1) Astronomical Unit
2) Light year
3) Parsec

Question 2. How long is a parsec in light years? In Astronomical Units?

Question 3. Describe how astronomers measure parallax and how this determines the distance to a star.

Question 4. How do absorption lines in stellar spectra relate to a star's position on the H-R diagram?

Question 5. If two stars have the same surface temperature and luminosity, and display the same spectral class, they will appear in the same spot on the H-R diagram and be the same color. What else can we assume is true about the two stars?

Question 6. Referring to figure 10.20, is the sun larger than average or smaller than average for a star? How massive are most stars?

Question 7. Do we see the most common spectral class of stars when we look in the night sky? Why or why not?

Question 8. Measuring the temperature of a star using the complete spectrum requires time and complicated equipment. Explain how astronomers use the "B-V color index" to quickly measure the temperature of a star.

Reference no: EM133476177

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