The Sky at Night — Episode 13: How Wrong We Were

You are watching the episode How Wrong We Were The science of astronomy is thousands of years old. Yet only in the last few decades have astronomers made discoveries that have proved the old theories wrong. Venus has no water - Mars has no canals - Man did not sink without trace into the moon's dust. Patrick Moore tells the stories of these old theories, and explains how, because of one mistake, the size of the universe was doubled.