Blue
Alhena, also known as Gamma Geminorum, is approximately 105 light years away from Earth.
Each star in Scorpius is a different distance from the other stars.
midorz
It is the distance of the extension of what your eyes can see. If the earth wasn't formed, there can be no possibility of measuring distances to or from it.
Stars in the night sky maintain the same distance from Earth. Despite their different distances from us, the stars appear to be at a fixed distance from each other when observed from our perspective on Earth.
"Libra" is a constellation ... a group of stars that seem to join in a pattern when viewed by humans on Earth, in a region of the sky defined by human astronomers on Earth. The stars in Libra are totally unrelated to each other, and each of them is at a different distance from Earth.
light years
5000 light years
The distance between the constellation Draco and Earth can vary because constellations are made up of stars at different distances from us. The stars in Draco are estimated to be between 200 to 400 light-years away from Earth.
All constellations are imaginary diagrams formed by patterns of many stars - each one it's own unique distance from Earth. So a constellation isn't a particular distance from Earth - as the stars only look like they're next to each other from our perspective here on Earth.
Distance from Earth, size of star, and temperature of star.