NATS 1745 Lecture Notes - Lecture 12: Giant Rock, Caroline Herschel, Orion Nebula
9 Oct 2017
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Short summary on moodle understanding saturn"s rings understanding comets: halley cataloguing the sky: Herschel: double stars, discovery of uranus, nebulae, structure of our galaxy. The rise of large telescopes: herschel, lord rosse. You need a cause to produce an effect. 3rd law every action and force has an equal reaction. Restoring no change in motion it is balanced. Gravity is the force that exists between objects with mass. It gives you how much force there is butting does not tell you why. Knowledge of position, mass, velocity etc. for given moment. Calculate all future (+past) positions, velocities etc. for all times. Motions occurs through absolute space and absolute time. Red light retracts the least and blue the most. He called the rings ears he did not understand that they were rings. Saturn is rotating on its axis while rotating around the sun. Huygens was the first to understand that saturn has rings.
