Physics

Measuring Distances in Astronomy

Measuring Distances in Astronomy

General purpose of this lecture is to present on Measuring Distances in Astronomy. Basic Principles are: Geometric methods; Standard candles and Standard rulers. The last two methods relate quantities that are independent of distance to quantities that depend on distance. The distance indicators include: Parallax; Cepheid Variables; Planetary Nebulae; Most luminous supergiants; Most luminous globular clusters etc.