“Stars radiate energy into space, thus depleting their finite supply of nuclear energy. Eventually that precious stellar commodity will be spent, at which point the stars will burn out and go dark. As will our sun, in about 5 billion years. In something like 1,000 billion years, all of the stars in t…”— Alan Lightman, nautil.usTagged: Stars, Cosmos, When Will The Sun Burn Out?, How The Sun Will Burn Out, The Stars Are Finite Objects