End of Days: Infamous Doomsday Prophecies

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  • Nostradamus
  • Y2K
  • Large Hadron Collider
  • Harold Camping
  • Sun Becomes a Red Giant
  • Mayan Apocalypse
  • Halley's Comet
  • Heaven's Gate
  • The Jupiter Effect
  • Pat Robertson

Future: Sun Becomes a Red Giant

Although it may be billions of years away, many scholars agree that, eventually, the sun will enter its red giant phase when it has converted all of its hydrogen into helium. When this occurs, the sun will expand to a size 20 percent greater than that of Earth's orbit (engulfing our planet) and shine 3,000 times brighter. 

(Photo: EPA/NASA /Landov)

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