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Defend Earth from alien invaders
Scientistd who study the motions of stars and planets,invented better tools for looking at the universe.
To be exiled,or thrown out, of a church or group
A new approach to studying the world
-Oserve some aspect of the universe.
-Hypothesize about what you oberved.
-Predict something based on your hypothesis.
-Test your predictions through experiments and observation.
-Modify hypothesis in light of results.
All knowledge is based on reason.
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