ASTR 330: The Cosmic Distance Scale

Course Description

An exploration of the cosmic distance ladder focusing on the systems and techniques that astronomers use in establishing the distances to celestial objects, from the very close (the size of the Earth), to the very far (the edge of the visible universe itself). Techniques covered will include, but are not limited to; naked eye methods for the Earth-Moon-Sun system; radar ranging for objects within the Solar System; trigonometric parallax methods; distance indicators using the interstellar medium; pulsating stars and other "standard candles"; methods based on the astrophysics of galaxies; Type Ia supernovae and related techniques; and methods based on gravitational wave astronomy. At each rung of the ladder, emphasis will be placed on the astrophysical principles and processes underlying the methodology being applied. This course includes an introduction to statistical techniques as applied in astronomical measurement, including a brief introduction to Bayesian techniques in astronomy. Four hours lecture. (OC).