solar system Flashcards

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1
Q

how do stars form

A

-form from cloud and dust (nebula)
-gravity causes nebula to collapse
-dust particles move fast and temp rises
-collapsing dust- protostar
-when protostar temp is high hydrogen nuclei becomes helium
-this is called nucleur fusion
-protostar becomes star

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2
Q

lifecycle of a ✰

A

after nucleur fusion, the protostar becomes main sequence starr.
-if star is same as sun, it shrinks and temp increases
- then it becomes a red giant
- when hydrogen runs out it becomes white dwarf then black dwarf

  • stars bigger than sun forms red super giant
    -explodes and becomes supernova whixh becomes neutron star or a black hole
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