science notes
universe - made of dark matter webs with lots of gravity
nebula - clouds of gas/dust which are very spread out
As these clumps get bigger and bigger, their gravity gets stronger and stronger
protostar - stage before star is formed
nebulas sometimes called "star nursuries" because u can find protostars
All stars are born in Nebulae
all stars start as a protostar
A protostar star is still gathering mass from the molecular cloud (Nebula Cloud)
then when a protostar pulls in matter it becomes dense//hot (10 million degrees kelvin)
nuclear fusion - where stars get energy from
Hotter stars are Blue
Cooler stars are Red
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