Posts Tagged ‘ptolemy’
What is the difference from solar system and Ptolemy's astronomy?
What is the difference from solar system and Ptolemy’s astronomy?
What if a deep space probe slammed into the celestial sphere?
What if Aristotle and Ptolemy were right? What if the Voyagers 1 and 2 crash into the celestial sphere? How would that change our space program and our view of our place in the universe?