Question

what stage will our Sun enter in about four billion years

Answer 1

do u have any specific choices??

Answer 2

or can it just be whatever?

Answer 3

http://www.universetoday.com/18847/life-of-the-sun/
try this website hope it helps!

Answer 4

or if that doent help use this
The sun has another 4 or 5 billion years before it uses up its nuclear fuel, at which point its outer layers will inflate turning it into a red giant, and then blow off altogether leaving a cooler, dense, white dwarf star.