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In the cores of extremely hot red giants, nuclear reactions convert helium to
a protostar reaches a temperature high enough for nuclear fusion to begin
the universe is expanding
within one of the spiral arms
gravity
red giant
distance
carbon
supernova
According to Hubble\'s Law, galaxies are retreating at a speed that is proportional to their
a protostar reaches a temperature high enough for nuclear fusion to begin
the universe is expanding
within one of the spiral arms
gravity
red giant
distance
carbon
supernova
When a main sequences star has exhausted the fuel in tis cores, it becomes a
a protostar reaches a temperature high enough for nuclear fusion to begin
the universe is expanding
within one of the spiral arms
gravity
red giant
distance
carbon
supernova
Which force is most responsible for the formation of a star
a protostar reaches a temperature high enough for nuclear fusion to begin
the universe is expanding
within one of the spiral arms
gravity
red giant
distance
carbon
supernova
Massive stars terminate in a brilliant explosion called a
a protostar reaches a temperature high enough for nuclear fusion to begin
the universe is expanding
within one of the spiral arms
gravity
red giant
distance
carbon
supernova
Where is our sun located in the Milky Way
a protostar reaches a temperature high enough for nuclear fusion to begin
the universe is expanding
within one of the spiral arms
gravity
red giant
distance
carbon
supernova
A star is said to be born when
a protostar reaches a temperature high enough for nuclear fusion to begin
the universe is expanding
within one of the spiral arms
gravity
red giant
distance
carbon
supernova
Based on the observed red shifts in the spectral lines of distant galaxies, astonomers conclude that
a protostar reaches a temperature high enough for nuclear fusion to begin
the universe is expanding
within one of the spiral arms
gravity
red giant
distance
carbon
supernova
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