a) Calculate the limiting visual brightness in magnitudes for naked eye viewing through a 10-m telescope. Assume the eye has a pupil diameter of 0.2 in.
b) The absolute visual magnitude of the sun is Mv = +4.82. Calculate the apparent visual magnitude of a sun in M31 Galaxy which is 700 kiloparsecs distant from the earth (1 pc = 3.1*10^18 cm). Could you see it with the aid of a 10-meter telescope?