Image via Amanda Cross.
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 colour variations are from the Earth’s atmosphere which splits the light from the star and the camera picks up the colors.
Bottom line: Photo compares colors of stars Rigel, Betelgeuse and Sirius.
from EarthSky https://ift.tt/2IbgkIJ
Image via Amanda Cross.
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 colour variations are from the Earth’s atmosphere which splits the light from the star and the camera picks up the colors.
Bottom line: Photo compares colors of stars Rigel, Betelgeuse and Sirius.
from EarthSky https://ift.tt/2IbgkIJ
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