premise: galaxies often contain hundreds of billions of stars sent2: a galaxy is a kind of celestial body / celestial object sent3: a celestial object has 200 billion stars, 30 million light years from earth, and 500 light years in diameter sent4: galaxies are usually thousands of light years in diameter sent5: galaxies are located millions of light years from earth.
hypothesis: a change in air temperature can cause water to change from one state of matter into another state of matter