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# a) How many astronomical units (AU) make 1 parsec?b) Consider the sun like a 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 $$(1/2)^0$$ from the earth. Due to atmospheric fluctuations, eye cannot resolve objects smaller than 1 arc minute.c) Mars has approximately half of the earths diameter. When it is closest to the earth it is at about 1/2 AU from the earth. Calculate at what size it will appear when seen through the same telescope.

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#### (a) According to the definition, 1 parsec is equal to the distance at which 1 AU long arc subtends an angle of 1 s.

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Q1
a) How many astronomical units (AU) make 1 parsec?
b)
Consider the sun like a 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 $$(1/2)^0$$ from the earth. Due to atmospheric fluctuations, eye cannot resolve objects smaller than 1 arc minute.
c)
Mars has approximately half of the earths diameter. When it is closest to the earth it is at about 1/2 AU from the earth. Calculate at what size it will appear when seen through the same telescope.
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Q2
Consider a sun like a star at a distance of $$2 parsec$$ . When it is seen through a telescope with magnification, what should be angular size of the star? Sun appears to be $$\left(\dfrac{1}{2}\right)^{o}$$ from the earth due to atmospheric fluctuations, eye cannot resolve objects smaller than $$1\ arc\ minute$$.
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Q3
Consider a sunlike star at a dis†an ce 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
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Q4
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 be1/2from the earth. Due to atmosperic fluctations , eye can't resolve objects smaller than 1 arc minute
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Q5
Mars is approximately half of the earth's diameter. When it is closest to the earth it is at about 12A.U. from the earth. Calculate what size it will appear when seen through the same tescope. (Diameter of sun is 100 times to the diameter of the earth).Sun appears to be 12 from the earth. Due to atmospheric fluctuations , eye can't resolve objects smaller than 1 arc minute?
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