Trending Questions What is the most complex element in the universe? How do you determine radial velocity? Why does the sun appear to be moving throughout a day? Does the earth revolves on its axis as it rotates around the sun? What are the strengths of the heliocentric model? What is 1300 light years? If tonight the phase of the moon is full when it rises what will be the phase 4 days from now? Why does the sun look little oval at the horizon? What kind of instruments do astronomers use to study the universe? How many stars are within 12.
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