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STARS (Stellar Classification (Temperature: The temperature of the star…
STARS
Stellar Classification
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OBAFGKM: this describes the lines described by a spectra, it's a classification for stars
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HIgh mass stars: This star is 3 times bigger than a sun, they are the largest and hottest stars in main sequence. Very big and bright
Stellar Distance
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Parallax: The apparent shift of an object's position relative to more distance background objects caused by a change in the observer's position
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Stellar evolution
The star first starts as a dust and gas cloud that's called a Nebula :check: : : : : : : then that cloud becomes hot and that causes nuclear fusion that cloud is called a protostar :check: which causes the star to convert into a sequence star, when that star runs out of hydrogen fuel, the star becomes a red giant or a red supergiant
The stars then becomes a low or medium star which causes the star to grow bigger and drift into space :check:that causes a star to form into a glass cloud, planetary nebula :check: The star begins to change color in it'a core, it changes into a white-blueish color which means that the star left it's cools and becomes a white dwarf :check: the star then stars to run out of fuel and turns into a black dwarf :check:
The stars contain a lot of star mass which makes it becomes a supergiant, red supergiants usually explode which cause the ar to form into a supernova :check: that material forms into a neutron star, which means that the star pulls all of its mass into its core, which becomes a black hole nothing could escape from it not even light because gravity is so strong
Astronomical unit:one astronomical unit represents the distance between the Earth and our sun. It's approximately 93 million miles
Hertzsprung-Russell Diagram:It's a graphical tool that astronoimers use to help them classify stars based on their luminosity, color, temperature and evolutionary stage