Question : Question Our neighbouring galaxy, the Large Magellanic Cloud, appears about 8 : 767994

Question

Our neighbouring galaxy, the Large Magellanic Cloud, appears about 8 across on the sky and consists of about 1010 stars at a distance of 50 kpc. Its brightest stars have an absolute magnitude of –10.0. Which of the following is true?

a) Individual main sequence stars are brighter than the limiting magnitude for the naked eye

b) The brightest stars in the LMC have an apparent magnitude of about 8.5 mag.

c) The LMC has an average of roughly 40,000 stars per square arc second on the sky.

d) The LMC is a naked eye object because its visual emission is mainly from gas, not stars.