Question

what is meant my parallax ? how can we find the distance by this method​

Answer 1

Answer:

Explanation:

How to measure distance using parallax?

Astronomers use an effect called parallax to measure distances to nearby stars. Parallax is the apparent displacement of an object because of a change in the observer's point of view.

...

Answer

1.       1/0.723 = 1.38 parsecs.

2.      1/2.64 = 0.34 arcseconds.

3.      Star A is closest to Earth. It is 1 parsec closer than Star B.

Answer 2

Answer:

Parallax is the shift of a point as viewed from different lines of sight.

Explanation:

The parallax formula states that the distance to a star is equal to 1 divided by the parallax angle, p , where p is measured in arc-seconds, and d is parsecs.

Parallax angle p in arc seconds = B / d.