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Olimpiade Sains Kota (OSK) Astronomi 2016 , Nomor 1

1

Assume that the Earth revolves around the Sun with a circular orbit and its distance is 1 au. The equation which describes Earth's position in cartesian coordinate relatives to the Sun is

a. y = x

b. y = 1 - x

c. y = 1 + x^2

d. y = 1 - x^2

e. (x-1)^2 + (y-1)^2 = 1