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Nebulae
beginning stages of a star
spiral
collection of gas, star, dust held together by gravity
cloud of gas and dust
main sequence
compares temperature and brightness
move up main sequence, brightness increases
lots of gas and dust, younger stars
HR Diagram
beginning stages of a star
spiral
collection of gas, star, dust held together by gravity
cloud of gas and dust
main sequence
compares temperature and brightness
move up main sequence, brightness increases
lots of gas and dust, younger stars
Nebulae
beginning stages of a star
spiral
collection of gas, star, dust held together by gravity
cloud of gas and dust
main sequence
compares temperature and brightness
move up main sequence, brightness increases
lots of gas and dust, younger stars
Galaxy
beginning stages of a star
spiral
collection of gas, star, dust held together by gravity
cloud of gas and dust
main sequence
compares temperature and brightness
move up main sequence, brightness increases
lots of gas and dust, younger stars
Shape of our galazy
beginning stages of a star
spiral
collection of gas, star, dust held together by gravity
cloud of gas and dust
main sequence
compares temperature and brightness
move up main sequence, brightness increases
lots of gas and dust, younger stars
Irregular Galaxy
beginning stages of a star
spiral
collection of gas, star, dust held together by gravity
cloud of gas and dust
main sequence
compares temperature and brightness
move up main sequence, brightness increases
lots of gas and dust, younger stars
Most stars exist on-
beginning stages of a star
spiral
collection of gas, star, dust held together by gravity
cloud of gas and dust
main sequence
compares temperature and brightness
move up main sequence, brightness increases
lots of gas and dust, younger stars
Hertzsprung-Russell Diagram
beginning stages of a star
spiral
collection of gas, star, dust held together by gravity
cloud of gas and dust
main sequence
compares temperature and brightness
move up main sequence, brightness increases
lots of gas and dust, younger stars
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