Lifeboat Foundation

Photographer Amanda Cross, of Lancashire, UK, wrote:

I wanted to compare the colors of different stars next to each other. These are stacks of Rigel, Betelgeuse and Sirius. I took individual images 60 seconds apart with iso 16000 and speed 1/50, stacked them with starstax and presented them together to show the different colors of the stars. I took the images deliberately out of focus to show the colors. The color variations are from the Earth’s atmosphere which splits the light from the star and the camera picks up the colors.