skysurfer
27-01-2017, 06:22 AM
In several articles, youtube clips and the largest online astronomy textbook (https://en.wikipedia.org/wiki/Betelgeuse) is stated that the star has a large envelope of gas and dust around it.
And, as we know, dust scatters and takes all blue light out of the light of a light source. E.g. remember the Sun shining red through smoke or dust ? Is Betelgeuse not the same: a bluish white Rigel-like supergiant star shining through this envelope scattering the blue light and leaving a red appearence ? And other red supergiants like VY CMa, VV Cep, Antares ? Of which the first two are as large as Saturn's orbit and should be sooooo tenuous, that they cannot have a photosphere. Is it here a dust envelope of which we measure the dimensions ?
I do not stat this is true, it is just a possibility I think.
What are your ideas ?
And, as we know, dust scatters and takes all blue light out of the light of a light source. E.g. remember the Sun shining red through smoke or dust ? Is Betelgeuse not the same: a bluish white Rigel-like supergiant star shining through this envelope scattering the blue light and leaving a red appearence ? And other red supergiants like VY CMa, VV Cep, Antares ? Of which the first two are as large as Saturn's orbit and should be sooooo tenuous, that they cannot have a photosphere. Is it here a dust envelope of which we measure the dimensions ?
I do not stat this is true, it is just a possibility I think.
What are your ideas ?