STARS
PLANETS
100
Hydrogen and Helium
What are the two elements of stars?
100
Habitable planet
What is Earth?
200
Where stars are born.
What is a star nebula?
200
red planet
What is Mars?
300
5 million year old red star
What is the sun?
300
rocky, terrastial, metal core
What are inner planets?
400
Force that causes stars to collapse
What is gravity?
400
ice crystals
What are rings of Saturn?
500
Collapse of a massive star
What is a neutron star?
500
blue planet
What is Neptune?
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