About 90% of the stars in the sky are main sequence stars on the H−R diagram. Explain why this makes sense if selecting stars at random. Also explain why there far fewer stars in the giant and supergiant region. Question 5 (4 points): Astronomers have discovered a binary star system containing two brown dwarfs at a distance of 6.5 light-years from Earth. How many parsecs is this? Show your calculations. Answer: