Suppose you are using the Doppler technique to look for planets around another star. What must you do?
A. Compare many spectra of an orbiting planet taken over a period of many months or years.
B. Compare the brightness of the star over a period of many months or years.
C. Carefully examine a single spectrum of an orbiting planet.
D. Compare many spectra of the star taken over a period of many months or years.
Answer:D
Suppose you are using the Doppler technique to look for planets around another star. What must you do?
A. Compare many spectra of an orbiting planet taken over a period of many months or years. B. Compare the brightness of the star over a period of many months or years. C. Carefully examine a single spectrum of an orbiting planet. D. Compare many spectra of the star taken over a period of many months or years.