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MOON
The
natural satellite of earth made visible by reflection of sunlight.
1.
the only place in our solar system, other than
Earth, where humans have visited 2.
like a desert with plains, mountains, and valleys 3.
also has many craters, which are holes created when
space objects hit the Moon's surface at a high speed 4.
no air to breathe on the Moon 5.
Recently water ice discovered at the poles of the
Moon –may be left from comet that once collided with it 6.
travels around the Earth in an oval shaped orbit 7.
is much smaller than the Earth, however, the pull
of its gravity can still affect the Earth's ocean tides 8.
Full lunar cycle –time it takes moon to orbit the
earth- about 29.5 days, just under a month 9.
As moon orbits Earth, half illuminated by Sun first
becomes increasingly visible (waxing), then decreasingly visible (waning) 10.
Moon always keeps the same face (near side) toward
the Earth. |