ASTRONOMY MILESTONES
Compiled by Chilman Sahni
YEAR MILESTONE
585 BC First prediction of the eclipse of the Sun.
130 BC Hipparchus calculates distance and size of Moon.
AD 1543 Copernicus shows that the Sun is at the centre of the Solar System.
1609 Johannes Kepler describes laws of planetary motion.
1610 Galileo Galilee discovers moons of Jupiter.
1655 Christian Huygens discovers Titan, moon of Saturn.
1668 Isaac Newton builds first reflecting telescope.
1687 Isaac Newton Publishes theories of motion of planets etc.
1705 Edmund Halley predicts return of the comet.
1671-1684 Giovanni Cassini discovers 4 moons of Saturn.
1774 Charles Messier compiles star catalog.
1781
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