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Kepler's first law states that the orbit of a planet about the Sun is a(n)
Q7: Which substance in Earth's atmosphere is the
Q69: On the absolute Kelvin temperature scale, the
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Q103: MOST moderate energy cosmic rays originate from<br>A)
Q116: Visible light occupies what portion of the
Q131: If there are about 6000 stars in
Q147: When observing planetary motions from Earth, the
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Q270: A comet, originating in the solar system,