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What are giant collections of clouds of gas and dust, along with many millions of stars, called?
the rotation of the Earth on its axis
these objects are moving away from us
galaxies
distance
Apollo 11
a comet
gravitational pull
distance from Earth
Most of the objects astronomers observe outside our galaxy show what is called a red-shift. What does this red-shift mean about these objects' motions?
the rotation of the Earth on its axis
these objects are moving away from us
galaxies
distance
Apollo 11
a comet
gravitational pull
distance from Earth
Which of these causes days and nights
the rotation of the Earth on its axis
these objects are moving away from us
galaxies
distance
Apollo 11
a comet
gravitational pull
distance from Earth
The first manned-mission to land on the moon was commanded by Neil Armstrong and was called
the rotation of the Earth on its axis
these objects are moving away from us
galaxies
distance
Apollo 11
a comet
gravitational pull
distance from Earth
Periodically, there are spectacular meteor showers on Earth. These showers usually occur because the Earth's orbit passes through the remains of
the rotation of the Earth on its axis
these objects are moving away from us
galaxies
distance
Apollo 11
a comet
gravitational pull
distance from Earth
A light year measures
the rotation of the Earth on its axis
these objects are moving away from us
galaxies
distance
Apollo 11
a comet
gravitational pull
distance from Earth
A person weighs more on the Earth than on the moon because the Earth has a greater
the rotation of the Earth on its axis
these objects are moving away from us
galaxies
distance
Apollo 11
a comet
gravitational pull
distance from Earth
Parallax can be used to measure a star's
the rotation of the Earth on its axis
these objects are moving away from us
galaxies
distance
Apollo 11
a comet
gravitational pull
distance from Earth
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