How do we measure distances to astronomical objects that are too far
away to use Trigonometric Parallaxes? This first lecture of Unit 4
reviews geometric methods like trigonometric parallaxes, and then
introduces the idea of Standard Candles, and how they are used to
develop methods for deriving Luminosity Distances based on the Inverse
Square Law of Brigh ... Show More
Jun 2009
Telescopes that Rocked Our World
This year marks the 400th anniversary of Galileo’s use of the first telescope. On this week’s show, we reflect on how telescopes have shifted our perspective on how small we are in size, space, and time. We also discuss how they help astronomers discover new and interesting aspec ... Show More
56 m