(a) How many astronomical units (A.U.) make 1 parsec? (b) Consider a sunlike star at a distance of 2 parsecs. When it is seen through a telescope with 100 magnification, what should be the angular size of the star? Sun appears to be (1 / 2)^∘ from the earth. Due to atmospheric fluctuations, eye can't resolve objects smaller than 1 arc minute. (c) Mars has approximately half of the earth's diameter. When it is closest to the earth it is at about 1 / 2 A.U. from the earth. Calculate what size it will appear when seen through the same telescope.

(a) How many astronomical units (A.U.) make 1 parsec? 

(b) Consider a sunlike star at a distance of 2. When it is seen through a telescope with 100 magnification, what should be the angular size of the star? Sun appears to be (1 / 2)^∘ from the earth. Due to atmospheric fluctuations, eye can't resolve objects smaller than 1 arc minute. 

(c) Mars has approximately half of the earth's diameter. When it is closest to the earth it is at about 1 / 2 A.U. from the earth. 

Calculate what size it will appear when seen through the same telescope.