In order to illustrate the size of a red giant star like Antares or Arcturus compared to our sun it is sometimes stated that if said red giant was in the center of our solar system, it’s surface would extend to the orbit of earth, mars etc.
Once our sun will have reached the state of a red giant it might or might not „swallow“ earth.
But - just hypothetically - would you even notice you were „inside the sun“?
I imagine that with sun‘s mass distributed across such a huge volume the density of its plasma, atmosphere, outer shell or whatever call it then ought to be quite low.
So I wonder if you still could see some kind of sky through the presumably thin outer layers of sun‘s atmosphere - that is if your position on earth is facing away from the sun?
Thanks for your thoughts and greetings
Ralph