The Earth and Beyond
What is the Moon?
The Moon is the Earth's natural satellite.
The diameter of the moon
is about ¼
that of the Earth.
It rotates about the Earth once in about 28 days.
It also spins on its axis once in this time and so
the same side of the moon is nearly always facing the Earth.
The surface temperature
of the moon
varies between about 130°C and -170°C.
This large temperature range occurs because
the moon has almost no atmosphere to trap heat.
The moon has less
the Earth because
it has less mass. At the moon's surface,
gravity is about one sixth as strong as it is on Earth.
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Copyright © 2012 Dr. Colin France. All Rights Reserved.