cosmosthe whole of the universe or a distinct part of it
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The universe or a specific part of it seen as well-ordered and harmonious system
extraterrestrialbeyond what is found on planet Earth
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Of or from outside the earth or its atmosphere
astrophysicsscience concerned with celestial bodies in outer space
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The branch of astronomy dealing with the physical properties of celestial bodies and phenomena
evolutiondevelopmental process through which species change over time
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A gradual development, especially from a simple to a more complex form
speculationassumptions or theories that are uncertain or unproven
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The forming of a theory or conjecture without firm evidence