They supernova.
Some stars happen to be in that direction.Some stars happen to be in that direction.Some stars happen to be in that direction.Some stars happen to be in that direction.
A constellation, such as Crux, contains billions of stars which are unrelated to one another - they just happen to be in the same direction, from our point of view.
From the material of old stars.
Depends on which 5 stars
Baseball Stars happened in 1989.
Prey the Stars happened in 2008.
Secret of the Stars happened in 1993.
Sword of the Stars happened in 2006.
Falling Stars happened in 2007.
Parasol Stars happened in 1991.
Astra Super Stars happened in 1998.
WWE All Stars happened in 360.