How do stars form into a constellation?!?

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Stars don't form into a constellation. Human beings take a scattering of stars and make them into a constellation. A constellation is just an arbitrary grouping of stars based on some pattern some ancient astronomer saw in the sky. They have absolutely no reality in terms of relationships between the stars. Constellations are groups of stars which happen to lie in the same direction as seen from Earth, but some may be very near and some very far away.How do stars form into a constellation?!?Stars of constellations are, on the whole, totally independent of each other. Constellations are for navigational purposes only. In other words the alpha (or main/first star) star is often many many light-years away from its beta star and so on throughout the constellation. They are a line of site observation only. If we were in a different part of our galaxy, we would not view these stars in the same patterns
The universe is expanding, as stars move outward, they form shapes in the sky that people see and call a constellation.How do stars form into a constellation?!?it doesn't we just make the constellations, with connecting the dotsHow do stars form into a constellation?!?
They don't. We just connect the dots with our imaginations.
The first two answers cover it, but here's a cool fact: The relative positions of the stars change over time, so the constellations we see right now will be totally different in a few thousand years, so new patterns will be defined as time goes on.How do stars form into a constellation?!?
Man plays 'connect the dots'.



Most of the constellations date back to the Arab astronomers, Indian astronomers, even as far back as the Greeks and Romans.



Man looked at the sky and drew lines, and then imagined the figures. (Look at Ursa Major and Minor, for example, or Draco).
A constellation is defined by people. Different cultures define constellations differently even now.
They don't. Humans see them and think up patterns.



The patterns aren't even universal; some cultures see a dipper in Ursa Major, while others see a plough. Or even a sedan chair. Some cultures see a scorpion in another part of the sky, while others see a fishing hook.
They don't, we just decided they do.