END OF PLANET EARTH

The 'end of planet Earth' refers to theories of when the Earth either completely ceases to exist as a planet or becomes uninhabitable for life.
According to astronomers, the Earth should last for at least 5 billion (5×10⁹) more years before the sun becomes a red giant. Due to the sun's loss of mass the Earth would escape to an orbit at a further distance than its current orbit. The immense heat however would likely boil off the oceans and turn the Earth into a barren wasteland looking like Mars does with a similar climate to Venus. Irrespective of the Earth surviving that event, the sun would have further evolved into a white dwarf and provide too little heat to sustain life.
Others say the atmosphere will lose its water vapor to space within 1.1 billion years (1.1×10⁹) because the sun will become about 10% hotter, and that the oceans will evaporate within 3.5 billion years (3.5×10⁹) when the sun is 40% hotter.
In 3.5 billion years (3.5×10⁹) the Andromeda Galaxy may collide with the Milky Way Galaxy and may wipe out some solar systems. Most scientists, however, believe that our Solar System will escape unharmed, though there is a chance that it may be ejected from the merging galaxies altogether.
Most scenarios concerning the ultimate fate of the universe would subsequently destroy the Earth (in the unlikely event of Earth lasting that long).

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See also

References

See also

★ Formation and evolution of the Solar System

★ End of civilization

References

★ A Brief History of the Universe

★ End of the World