logo
episode-header-image
Feb 2006
41m 33s

Lecture 23: The Milky Way

Richard Pogge
About this episode
What is the Milky Way, and what is our place within it? This lecture introduces the Milky Way, the bright band of light that crosses the sky, and describes how we came to our present understanding of the size and shape of the Milky Way Galaxy, and our location in it. Recorded 2006 February 7 in 1008 Evans Laboratory on the Columbus campus of The Ohio State ... Show More
Up next
Feb 2006
Lecture 22: The Cosmic Distance Problem
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 meth ... Show More
46m 5s
Feb 2006
Lecture 21: Testing Stellar Evolution
What are our observational tests of Stellar Evolution? This lecture discusses how we use Hertzsprung-Russell Diagrams of star clusters to test stellar evolution theory, and some of the conclusions we have drawn. In particular, we will see how the age of a star cluster can be esti ... Show More
41m 19s
Feb 2006
Lecture 20: Black Holes
What happens if even Neutron Degeneracy pressure is insufficient to halt the collapse of gravity? In that case, the object simply collapses in upon itself, approaching a state of infinite density. Such an object has such strong gravity that nothing, not even light can escape from ... Show More
43m 15s
Recommended Episodes
Dec 2009
Astronomy 141 Podcast Teaser
A new podcast, Astronomy 141, Life in the Universe, is available for those interested in continuing an exploration of topics in modern astronomy. 
1m 2s
Sep 2007
Lecture 01: Introduction to Astronomy 161
What is Astronomy? What is Science? What is the course all about? Brief introductory remarks after going over course mechanics on the first day of Astronomy 161 for Autumn Quarter 2007. Recorded 2007 Sep 19 in 1000 McPherson Lab on the Columbus campus of The Ohio State University ... Show More
13m 48s
Nov 2007
Lecture 46: Are We Alone? Life in the Universe
Are we alone in the Universe? This lecture explores the question of how we might go about finding life on planets around other stars. Rather than talking about speculative ideas, like the Drake Equation or SETI, I am instead taking the approach of posing it as a problem of what t ... Show More
41m 23s
Apr 2023
A Glimpse into the Past: 3 Billion Years After the Big Bang | Space Nuts 349
Get ready to explore a 10 billion year old mystery! A closely bound duo of energetic quasars, the hallmark of a pair of merging galaxies, have been discovered when the Universe was only 3 billion years old. What secrets do these quasars hold and why have they lasted so long? Join ... Show More
52m 38s
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
Nov 2023
Astronomical Inquiries: Unravelling the Mysteries of Space with Listener Questions | #380
In this episode as we (attempt) to answer your burning questions, you will be able to: · Explore the mind-bending mysteries of black holes and event horizons. · Discover fascinating specializations within the fields of physics and astronomy. · Uncover the constant evolution and b ... Show More
43m 9s
Listen to millions of songs and podcasts on Anghami