Life Cycle of a Star Crossword Puzzle

A nebula slowly starts to what under the force of gravity.
In the main sequence stage to form helium atoms in their core they have to fuse what kind of atoms?
A protostar is a very hot cloud of densley packed what?
A shell of what kind of reactions are caused after the main sequence stage when the hydrogen fuel becomes exhausted?
A supergiant star's starts to collapse and heat up, after a helium burning red giant runs out of helium fuel in its core. This phase causes the outer layer to expand and do what.
In the white dwarf stage after all the outer layers drift away only what remains?
A supernova is the what of a high-mass star.
Which stage is when the compact core remains from the supernova event.
What type of star emits no heat or light?
After the supernova event everything that remains is crushed down, forming an incredibly small, dense object known as what.