The International Astronomical Union defines a planet as a celestial body that orbits the sun, is massive enough that gravity has forced it into a spherical shape, and has cleared away other objects ...
Sci-fi is exactly like rock music. Depending on who you ask, different people believe different definitions of science fiction apply. For most, concocting the secret formula for "real" science fiction ...
In 2008, the National Academy of Sciences put forth a textbook-ish definition of "science": "The use of evidence to construct testable explanations and predictions of natural phenomena, as well as the ...
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