Astronomy: The Original Science STUDYING SPACE
Modern Calendar Based on observations of bodies in our solar system
Day Time required for Earth to rotate once on its axis
Month Time required for the moon to revolve once around Earth
Year Time required for Earth to revolve once around the Sun
TWO CAMPS OF THOUGHT PtolemyCopernicus
Sun is center of universe All heavenly bodies revolve around Sun Spurred major changes in science & society Earth is center of universe All heavenly bodies revolve around Earth TWO CAMPS OF THOUGHT PtolemyCopernicus
Tycho Brahe Thought the Sun revolved around Earth & other bodies revolved around Sun Made precise observations
Johannes Kepler All planets revolve around the Sun Developed 3 laws of planetary motion
Galileo Galilei First to use a telescope to observe objects in space
Galileo’s Discoveries Craters on moon Mountains on moon 4 moons of Jupiter Sunspots on the Sun
Sir Isaac Newton Law of Gravity Explained why all planets orbit the most massive object in solar system - Sun
Edwin Hubble Proved that there are other galaxies in universe. Confirmed belief that universe is much larger than first thought.