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