Question

A student observes a star from two positions of Earth in its orbit, in summer and winter, and measures the change in the position of the star. Which of these can be best calculated by this method?

I think it's A, but I'm not completely sure.

Answer 1

the shift in light traveling from star to Earth in winter

the shift in light traveling from star to Earth in summer

the distance of the star from Sun using parallax method

the distance of the star from Earth using parallax method

Answer 2

It's not A:)

http://lcogt.net/spacebook/parallax-and-distance-measurement

Answer 3

There's a good intro video on Khan Academy about this: http://www.khanacademy.org/science/cosmology-and-astronomy/v/stellar-distance-using-parallax