Sadr (γ Cygni)
Some stars are surrounded by the most spectacular backdrops, and Sadr in the constellation of Cygnus is certainly one.
The star itself was a blue giant which has now expanded into its supergiant stage, and it's colour has changed from the blue's you see in the Pleiades cluster to a yellow white, as the increased surface area of the star's temperature lowers, it moves towards the red colour.
It's estimated to only be 12 million years old, compared to the 4,600 million years age of our sun, but very typical of these fast burning massive stars.
While it's distance is 1,800 light years from Earth, the background nebula's and clusters are much further behind it, around 4,000 light years from Earth.
Above is NGC 6910 Open cluster and IC 1318 the Butterfly Nebula.
