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Life Cycle of Stars

Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Across
4
Nuclear fusion stops after a star fuses up to iron in its core.
7
When two or more atoms slam together to make a heavier element, giving off light and heat in the process
8
The beginning of time
9
Matter from exploded stars and planetary nebula gets reused in the universe.
10
An object with such strong gravitational force that not even light can escape.
13
The longest stage of a star's life.
14
Leftover remnants of large exploded stars that spin and shoot energy into spaces
15
Our galaxy
Down
1
Parts of the nebula collapse and become denser. It heats up but its not a star until nuclear fusion.
2
The star is so large that it can fuse element all the way up to iron
3
Leftover remnants of large exploded stars They are 6 miles wide and very dense about the size of the earth.
5
Star layers get puffed away from core and leftover core becomes a white dwarf
6
A star fuses Helium into carbon and the star grows 10x bigger.
11
Solar wind strikes earths magnetic field and causes these light displays
12
Giant cloud of gas and dust made mostly of H and He,but can also have recycled stardust