In the parallax method of determining stellar distances, the angle to a star is measured while che earth is on one side of the sun and then again six months later, as in the diagram below. Assume the earth-sun distance is 1 Astronomical Unit. The parallax angle of Alpha Centauri s 0= 2.1 × 10-4 ° . Find the distance from the sun to a Centauri in light years. Assume a eircular orbit for the Earth. a Centauri Earth (June) Earth (December) Sun

In the parallax method of determining stellar distances, the angle to a star is measured while che earth is on one side of the sun and then again six months later, as in the diagram below. Assume the earth-sun distance is 1 Astronomical Unit. The parallax angle of Alpha Centauri s 0= 2.1 × 10-4 ° . Find the distance from the sun to a Centauri in light years. Assume a eircular orbit for the Earth. a Centauri Earth (June) Earth (December) Sun