End of Planet Earth
The end of planet Earth refers to when the Earth
is theorized to either completely cease to exist as a planet or become uninhabitable
for life.
According to astronomers, the Earth should last for at
least five billion 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.
If the Earth survived this event, the sun would further evolve 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 because the sun will become about 10% hotter,
and that the oceans will evaporate within 3.5 billion years when the sun is
40% hotter. In 3.5 billion years the Andromeda Galaxy may collide with ours
and may wipe out some solar systems.
Most scenarios concerning the ultimate fate of the universe would
subsequently destroy the Earth.
http://en.wikipedia.org/wiki/End_of_planet_Earth
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