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The type of death a star will experience depends on
mass
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Which force is most responsible for the formation of a pre-star?
gravity
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Stars with surface temperature less than 3000K appear _______
red
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Stellar distances are usually expressed in units called ______
light years
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The brightness of a star, if it were at a distance of 32.6 light-years, is its
absolute magnitude
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According to the Big Bang theory, a cataclysmic explosion created the matter in the Universe about _______ years ago
15 million
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The magnitude of a star as we "see" it from Earth?
apparent magnitude
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Very massive stars terminate in a brilliant explosion called a _______
supernova
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One light-year is about __________.
9.5 trillion kilometers
-
A very young, large object that is soon to become a star but is not yet hot enough for nuclear fusion is termed a _________.
protostar
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What is the main fuel for a red giant
helium
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A(n) __________, is a famous interstellar mass that absorbs ultraviolet light from an embedded or nearby star and radiates, or emits this energy as visable light
bright nebula
-
Which color stars have the hottest surface temperature.
blue
-
The final stage for a star that is as massive as the Sun
white dwarf
-
The apparent change in wavelength of radiation caused by the relative motions of the source and the observer is referred to as _________.
the Doppler effect
-
Most stars are in this stage of evolution
main-sequence
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The apparent change in the the position of a celestial object due to the orbital motion of Earth is called _________
stellar parallax
-
The red shifts exhibited by galaxies can be explained by ________
an expanding universe
-
What is labeled on the y-axis of the H-R Diagram?
Absolute magnitude
-
This is produced during a supernova event.
black hole
-
An interstellar accumulation of dust and gases is referred to as
nebula
-
Which part of the HR Diagram are the redgiants located?
upper right
-
What is produced as a result medium mass star collapsing?
planetary nebula
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