Main-Sequence Stars Have About the Same Density as the Sun

Q169: Arcturus has an mV = -0.04 and

Q170: Proxima Centauri has an absolute visual magnitude

Q171: We know the white dwarf star Sirius

Q172: Some giants and/or supergiants are less dense

Q173: Parallax would be easier to measure if<br>A)Earth's

Q175: A star's apparent magnitude is a measure

Q176: A star's luminosity depends only on the

Q177: How do the spectra of giants, supergiants,

Q178: Why don't we see hydrogen Balmer lines

Q179: The best sample of the true numbers