Which one of the methods below enables astronomers to measure the distance of a star near the Sun in our galaxy
A)sound echoes knowing the speed of sound and time
B)parallax using Earth's orbit
C)human binocular vision
D)Balmer series
E)none of the above

Question

Quizplus · Accepted Answer

Parallax using Earth's orbit is a method used by astronomers to measure the distance of a star near the Sun in our galaxy. The position of the star is observed twice, six months apart, and the shift in its apparent position with respect to the background stars is used to calculate the distance. This method is effective for measuring distances of stars up to a few hundred light-years away.

Which One of the Methods Below Enables Astronomers to Measure