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Parallax can be used to measure a star's
the rotation of the Earth on its axis
these objects are moving away from us
corona
galaxies
their total mass
Apollo 11
distance from Earth
distance
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
corona
galaxies
their total mass
Apollo 11
distance from Earth
distance
Stars evolve along several different paths and reach different end points, based primarily on what factor?
the rotation of the Earth on its axis
these objects are moving away from us
corona
galaxies
their total mass
Apollo 11
distance from Earth
distance
A light year measures
the rotation of the Earth on its axis
these objects are moving away from us
corona
galaxies
their total mass
Apollo 11
distance from Earth
distance
Which of these causes days and nights
the rotation of the Earth on its axis
these objects are moving away from us
corona
galaxies
their total mass
Apollo 11
distance from Earth
distance
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
corona
galaxies
their total mass
Apollo 11
distance from Earth
distance
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
corona
galaxies
their total mass
Apollo 11
distance from Earth
distance
Which layer of the sun is seen during a total solar eclipse?
the rotation of the Earth on its axis
these objects are moving away from us
corona
galaxies
their total mass
Apollo 11
distance from Earth
distance
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