STARS!! Flashcards
STAR THAT DOES NOT CHANGE ITS POSITION IN THE SKY
POLARISSS
an interstellar cloud that is
rich in gases and dust in space.
stellar nebula
a stellar nebula consists of ?
92% hydrogen, 7% helium, and 1% heavier gases
It is formed as a result of pulling
the hydrogen gas in the nebula
together by gravity.
protostar
A ? is any star
that has a hot, dense core that
fuses hydrogen into helium to
produce energy.
main sequence star
Its life cycle is determined by its
mass—the larger its mass, the
shorter its life cycle; the smaller
its mass, the longer its life cycle.
main sequence star
It is formed when a main
sequence star runs out of
hydrogen in its core and no
longer generates heat by nuclear
fusion.
red giant
It is a region of cosmic gas and dust
formed from the cast-off outer layers of
a dying star.
planetary nebula
It is formed during the late stages of a
star’s life, typically when a star has used
up all its nuclear fuel and has expanded.
planetary nebula
It is formed once an average star
consumes its fuel.
white dwarf.
For lower-mass stars, the outer layers
are expelled to form a planetary
nebula, leaving behind a hot core called
a ?
white dwarf.
They are among the largest stars in
the universe.
red supergiant
They have relatively short life spans
compared to other types of stars.
red supergiant
“A star must be between ? and ? times
more massive than our Sun to have the
mass needed to become a red
supergiant.”
8, 40
It is an explosion that marks the end of
a star’s life.
supernova
