Earth, Moon, and Our Solar System Vocabulary

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Earth, Moon, and Our Solar System Vocabulary
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Rotation means to spin around an axis.
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Revolution means to travel in a closed path.
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An axis is an imaginary line that runs through
the center to the Earth from the North Pole to
the South Pole.
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A phase is one of the shapes the moon seems to
have as it orbits Earth.
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Orbit is a closed path of one object in space
around another object, or to move in such a path.
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Seasons are caused by the tilt of the Earth.
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The Earth is divided into four spheres called
hemispheres. These are the Northern, Southern,
Eastern, Western hemisphere(s).
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A star and all the planets and other objects that
revolve around it is called a solar system.
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A planet is a large body that revolves around a
star.
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The galaxy is a huge system of gases, dust, and
many stars.
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A star is a huge ball of superheated gases.
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A pattern of stars that form an imaginary picture
or design in the sky is called a constellation.
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Optical Telescopes are used to study faraway
objects in space.
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Cyclical means to recur in cycles (a series of
events that regularly repeat in the same order).
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Crewed or "manned" missions have humans aboard to
control the spacecraft and handle its operations.
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The sun is the star at the center of our solar
system.
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Space probes are long-term satellites that have
no one aboard. They often travel a long distance
for the purpose of collecting pictures and data.
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A satellite is an artificial body placed in orbit
around the earth or another planet in order to
collect information or for communication.
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Reflection is the bouncing of light off of an
object.