logo
episode-header-image
Nov 2007
43m 54s

Lecture 45: Exoplanets - Planets Around ...

Richard Pogge
About this episode
Are there planets around other stars? Are there Earth-like planets around other stars? Do any of those harbor life? Intelligent life? We'd like to know the answers to all of these questions, and in recent years we've made great progress towards at least answering the first. To date, more than 260 planets have been found around more than 200 other stars, ... Show More
Up next
Nov 2007
Lecture 44: Comets
Comets are chance visitors from the icy reaches of the outer Solar System. In this lecture I describe the properties of comets, their historical importance, and introduce the "dirty snowball" model of a comet nucleus. At the end of class I created a model of a comet nucleus from ... Show More
37m 59s
Nov 2007
Lecture 43: Icy Worlds of the Outer Solar System
Beyond the orbit of Neptune lies the realm of the icy worlds, ranging in size from Neptune's giant moon Triton and the dwarf planets Pluto and Eris, all the way down to the nuclei of comets a few kilometers across. This lecture discussed the icy bodies of the Trans-Neptunian regi ... Show More
36m 29s
Nov 2007
Lecture 42: Asteroids
Asteroids are the leftover rocky materials from the formation of the Solar System that reside primarily in a broad belt between the orbits of Mars and Jupiter. This lecture reviews the physical and orbital properties of Asteroids, and discusses the role of Jupiter and orbital res ... Show More
40m 46s
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 2006
Welcome to Astronomy 161
Welcome to the Astronomy 161 Lecture Podcasts. This is a brief message from me explaining the podcasts, and welcoming new and old listeners. University. Lectures will begin on Wednesday, 2006 Sept 20, and run through Friday, 2006 December 1. New lectures will appear shortly befor ... Show More
4m 6s
Nov 2018
#065 Talking about Astronomy in English
>> Get my new course: The PRONUNCIATION Course 2024! Visit PronunciationCourse.com and get the course! 
17m 45s