Which of the following quantities do you need in order to calculate a star's luminosity? Naim 00:45 Astronomy 101 Which of the following quantities do you need in order to calculate a star's luminosity? a) apparent brightness b) Doppler shift of spectral lines c) color of the star d) distance to the star e) a and d Answer: e) a and d Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+