solar system Flashcards
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
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