Sources:

When will the sun die?:
https://www.space.com/14732-sun-burns-star-death.html

Our Sun — In Depth:
https://solarsystem.nasa.gov/solar-system/sun/in-depth/

Technology Through Time - Issue #50: Ancient Sunlight:
https://sunearthday.nasa.gov/2007/locations/ttt_sunlight.php

The End of the Main Sequence:
https://iopscience.iop.org/article/10.1086/304125

Science Explained: How Does the Sun Work?:
https://futurism.com/20083

Will The Sun Become A White Dwarf? [What Is The Suns Fate?]:
https://www.astronomyscope.com/will-the-sun-become-a-white-dwarf/