Question

How is the distance between stars calculated?

Answer 1

the distance is measured in parsecs and parallel angles is measured in arcseconds

Answer 2

It seems obvious: if you want to measure the size of a star, just point your telescope at it and take a picture. Measure the angular size of the star in the image, then multiply by the distance to find the true linear diameter.The Distance to the Nearest Star. The distances between stars are huge. The distance from the Sun to Proxima Centauri is 4.22 light years which is equal to forty trillion kilometres. To walk this distance would take you about one billion years.