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space and chemistry

words about space and chemistry

list the main 3 types of galaxys? Spiral Galaxy,Elliptical Galaxy,and Irregular Galaxy.
how many molecules are in 8Co+2h? 10.
which side is the reactant in this equation 2Su+4i-->4i+2Su? the left one.
how hot and bright is the sun compared to other stars? average.
what is an HR diagram? a graph that shows the temperature and how hot a star is.
what are comets made of? dust and ice.
what is popularly know has shotting star? a meteor.
Created by: brunoveras