as per wiki
"Red giants are stars that have exhausted the supply of hydrogen in their cores and switched to thermonuclear fusion of hydrogen in a shell surrounding the core. They have radii tens to hundreds of times larger than that of the Sun. However, their outer envelope is lower in temperature, giving them a reddish-orange hue. Despite the lower energy density of their envelope, red giants are many times more luminous than the Sun because of their great size. Red-giant-branch stars have luminosities about a hundred to several hundred times that of the Sun (L☉), spectral types of K or M, have surface temperatures of 3,000–4,000 K, and radii about 20–100 times the Sun (Sol). Stars on the horizontal branch are hotter, whereas asymptotic-giant-branch stars are around ten times more luminous, but both these types are less common than those of the red-giant branch."
Sol is millions, if not billions of years off this happening, I doubt humanity as a species will be around to witness this occurrence, plus it would not be good for Earth as the planet would be consumed by Sol.
AKA-Dean
"I will never make excuses for who I am. It is the way I was born. I am a HUNTER. a BONE COLLECTOR."
Wave Man, the term "wave man" is the English translation of 'Ronin' (Japanese word) and literately translates to "wandering person" and in a modern context a WaveMan is one who is socially adrift or a SalaryMan who is between employers.