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A
B C
D E
F G
H I
J K
L M
N O
P Q
R S
T U
V W
X Y
Z
T
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Telescope:
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A mechanism used to observe distant objects
by collecting and focusing their electromagnetic
radiation. Telescopes are typically planned
to collect light in an exact wavelength range.
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Temperature:
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A measure of the quantity of heat energy
in a substance, such as air, a star, or even
the human body. Because heat energy corresponds
to motions and vibrations of molecules, hotness
provides in sequence about the amount of molecular
motion going on in a substance.
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Terrestrial Planets:
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The four planets of the inner solar system
(Mercury, Venus, Earth, and Mars) are known
terrestrial planets since they are made up
mostly of rock.
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Triton:
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The biggest of Neptune’s satellites.
Triton has an atmosphere and is approximately
the size of Earth's moon. It has an “ice
cap” of cold nitrogen and methane with
“ice volcanoes” liquid nitrogen,
dust, and methane compounds from under its
frozen surface.
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