Transformation of our Sun into a White DwarfOnce our sun becomes a Red Giant, it won't be hot enough to ignite the carbon in its core, it will succumb to gravity again. When the core of the star contracts, it will cause a release of energy that makes the envelope of the star expand. Now the star has become an even bigger giant than before, Our Sun's radius will become larger than Earth's orbit!
The Sun will not be very stable at this point and will lose mass. This continues until the star finally blows its outer layers off. The Sun will never fuse carbon however, instead it will shed its outer layers forming a planetary nebula. Our Sun will cool down, radiating heat into space and fading into black lumps of carbon.
The core of the star, however, remains intact, and becomes a white dwarf. This remnant will have a mass of around half that of our present Sun, but will be the size of the Earth.
@thewonderofspace
