Stars: Earth's Orbit Around the Sun Has a Mean Radius

Multiple Choice

Stars: Earth's orbit around the sun has a mean radius of 1.5 × 10⁸ km. Over a six-month period, the apparent position of a particular star varies by 0.00014° due to parallax. How distant is the star, in ly? (1 ly = 9.461 × 10¹⁵ m)

A) 0.13 ly
B) 1.3 ly
C) 13 ly
D) 130 ly
E) 1300 ly