On November 30, 1609, Galileo turned his telescope towards the night sky. This singular act revolutionised astronomy. Until then, scholars held that celestial objects were without any kind of blemish. Galileo showed that the Moon had craters and mountains. All celestial objects, including stars, were thought to go around the Earth. The telescope, by observing phases of Venus firmly established that planets go around the Sun and not the Earth. The Milky Way, a haze in the dark night teemed with hundreds of stars, established that the cosmos is immense and beyond our imagination. Galileo revolutionised astronomy using a crude telescope which by today’s standards is merely a toy. (Read More)
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