ASTR 1101 Lecture Notes - Lecture 4: Orbital Speed, Naked Eye, Semi-Major And Semi-Minor Axes

• School: Mount Royal University
• Department: Astronomy
• Course: ASTR 1101
• Professor: Nicholas Hill

Document Summary

Example 1 theory of general relativity (one could verify this) o . Example 2 ufo sightings (there is no way to verify these sightings) Example 3- ufo base on the far side of the moon (could be verified) o . Most accurate and complete naked-eye observations possible believed in geocentric model. Used brahe"s data to model heliocentric orbit of mars. Spent 5 years and 72 models (all circular, constant speed orbits) o o . Imaginary line from the sun to planet sweeps out equal area from a-b in equal time. Orbital period squared equals average distance (semi-major axis) cubed. 3. 2 newton"s great synthesis newtons laws of motion. Natural state of motion to move in a straight line at a constant speed/velocity. Speed rate of change of position (m/s) o . Measures deviation from straight line, constant speed motion. Rate of change of velocity (m/s^2) o o .