DaveC426913
Valued Senior Member
It does not.If mass equates to size and diameter
Does a helium balloon mass as much as a bowling ball?
Did you know that Saturn - despite being the second largest planet in our solar system - is so rarefied that it would float in water?
Mass and size are related by density.I do enjoy these things, but I must admit some ignorance also. Maybe you can clue me in on how to appropriately utilize the term mass in relation to the sun as it is and as it will.one day be as a red giant.
The sun's mass will stay the same, but when its volume increases, it will get less dense. Like a souffle in the oven, it will puff up and get fluffy.
(The reason its volume will increase has to do with the life cycle of stars and how they use fusion to stay starlike, simplistically, when the fusion stops, the star is not longer bound to its main sequence form and expands into a large diffuse star with a vast atmosphere.)
You can read a little about it on Wki: https://en.wikipedia.org/wiki/Red_giant