The Sun Will Swallow Earth One Day In about 5 billion years, the Sun will reach the end of its life cycle and begin a dramatic transformation.As it runs out of hydrogen fuel in its core, it will expand into a red giant growing so large that it may engulf the inner planets, including Mercury and Venus. Earth’s fate is uncertain, but it's possible our planet will be consumed as well, scorched by the Sun’s growing heat and pulled into its outer layers. Even if Earth escapes being swallowed, its surface will be scorched beyond recognition, making life impossible. Eventually, the Sun will shed its outer layers, leaving behind a dense, dim core called a white dwarf a stellar remnant about the size of Earth but with half the Sun’s original mass.This quiet end will mark the final chapter of our solar system's once vibrant central star. #space #science #fact #facts