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re: Astronomy Picture of the Day. April 28, 2024. Messier 57
Posted on 4/28/24 at 11:05 am to blueridgeTiger
Posted on 4/28/24 at 11:05 am to blueridgeTiger
Is the red colored matter moving away and blue/green moving towards us? Or is that a different kind of light analysis?
1
Posted on 4/28/24 at 11:26 am to GRTiger
quote:
Is the red colored matter moving away and blue/green moving towards us? Or is that a different kind of light analysis?
The colors are not the same as the red-shift/blue-shift for analyzing object speed. These colors do not indicate relative velocity but rather indicate the composition of the nebula.
Blue: The central blue region represents ionized helium. This helium is primarily close to the hot core of the white dwarf.
Cyan: The inner ring glows due to ionized hydrogen and oxygen.
Reddish: The outer ring’s reddish hue comes from ionized nitrogen and sulfur.
These colors are a result of the nebula’s chemical composition and the interaction of ultraviolet light with the surrounding gas
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