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 The
closest planet to the Sun is Mercury. This tiny rocky planet races
around the Sun in just 88 days. You would not survive for long on
Mercury, because you would not be able to breathe its very thin
atmosphere. The part of its surface facing the Sun is intensely hot,
while the other part is very cold. Scientists believe that
when the Sun runs out of fuel, in about five billion years, it
will swell up and engulf Mercury.
Click on the buttons below to see more
on the inner planets.
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