@psuedenham

When Galileo trained his telescope on the night sky he saw things no human being had ever seen before. The Moon was not a smooth, perfect sphere as had been assumed for millennia. It was scarred and pitted like the imperfect Earth. There were four small planets that moved across the sky with Jupiter, changing position as they went. Galileo deduced they were Jupiter’s moons - an astounding conclusion when conventional wisdom still held Earth as the centre of the universe. As for the stars, there were many, many, many more than anyone had ever imagined. #galileo #astronomy #historyofastronomy #historyofseeing #stargazing #telescope @nasa @sea.museum @sciencemuseum