What If the Sun Became a Red Giant

What happens if the Sun becomes a red giant — the real sequence, the hard numbers, and why 5 billion years is not the date that actually hits you. 0:00 The Hook 0:42 Five Billion Is the Easy Number 1:55 How a Star Gets Fat 3:20 The Sky That Eats Night 4:30 Mercury and Venus Go First 5:30 What Hits Your Street 7:10 The Helium Flash 8:25 What Does Not Happen 9:30 A Cinder Around a Coal 10:30 The Last Sky Public-record solar models only. Dates are approximate. Earth's engulfment is still a modeling question as of 2026 research. Tags: red giant, sun death, what if the sun, earth engulfed, white dwarf, helium flash, solar evolution, astronomy #RedGiant #Sun #WhatIf #Astronomy #Earth #Space #FutureOfEarth #WhiteDwarf Disclaimer: This video is an explainer, not a forecast of events in our lifetimes. Numbers are drawn from published stellar-evolution tracks and should be read as about, not exact. Visuals are original AI-generated stills. Audio may be synthetic. Not medical, legal, or financial advice.