Astronomy 141 - Life in the Universe - Autumn Quarter 2009

Astronomy 141 - Life in the Universe - Autumn Quarter 2009

By Richard PoggeScienceEducationCoursesNatural SciencesAstronomy
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Astronomy 141 - Life in the Universe - Autumn Quarter 2009 episodes

  • Lecture 6: The Geological Revolution - Deep Time and the Age of the Earth
    The geological revolution revealed that the Earth is of great antiquity
    and yet has a history we can read in the land. We will discuss ideas
    of cyclic and linear time, historical versus physical age estimates,
    the discovery of geological time, and
    radiometric dating methods that give us our present estimate of
    4.54+/-0.05 Gyr for the age of the Earth. Recorded live on 2009 Sep 30
    in Room 1005 Smith Laboratory on the Columbus campus of The Ohio State
    University.
    47 min
  • Lecture 5: The Chemical Revolution and the Nature of Matter
    What is the nature of matter, and how did we come to understand the
    chemical elements and atomic structure? This lecture is a brief and
    selective overview of the history of our understanding of the nature of
    matter and chemistry. We will also introduce spectroscopy and
    radioactivity, two very powerful tools that came out of the chemical
    revolution that are crucial for the inquiry in this class into the
    question of life on other worlds. Recorded live on 2009 Sep 29 in Room
    1005 Smith Laboratory on the Columbus campus of The Ohio State
    University.
    46 min
  • Lecture 4: The Copernican Revolution
    Modern science was borne of an effort over many centuries to understand
    the motions of celestial bodies. The Copernican Revolution of the 16th
    and 17th centuries was the crucial moment in history when we finally
    understood the nature of celestial motions, and opened the door to the
    modern world. This lecture reviews the problem of celestial motions,
    the two competing models for explaining them, and the final revolution
    in thought starting with Copernicus and ending with Newton. Mid-lecture
    my classroom AV system lost power, and the recovery slowed things down a
    bit. These are recorded live, after all. This lecture was conducted on
    2009 Sep 28 in Room 1005 Smith Laboratory on the Columbus campus of The
    Ohio State University.
    44 min
  • Lecture 3: Imagining Other Worlds
    What is the cultural history of our imaginings of other worlds and their
    possible inhabitants? I will draw examples from history, philosophy,
    literature, cinema, and popular culture. In the end,
    our imaginings about other worlds inform us more about ourselves, our
    hopes and our fears, than about extraterrestrial life. The scientific
    inquiry we are undertaking must therefore approach the problem from a
    different direction. Recorded live on 2009 Sep 25 in Room 1005 Smith
    Laboratory on the Columbus campus of The Ohio State University.
    41 min
  • Lecture 2: Astronomical Numbers
    An introduction and review of the basic notation and physical units we will be
    using throughout this course. In particular, we will be using the
    Metric (SI) system for lengths, masses, times, and temperatures, and
    special astronomical units for distances (AU and Light Years) and masses
    (Earth Masses and Solar Masses) appropriate when discussing
    interplanetary and interstellar scales. Recorded live on 2009 Sep 24 in
    Room 1005 Smith Laboratory on the Columbus campus of The Ohio State
    University.
    44 min
  • Lecture 1: Introduction
    A brief overview of the topics we will cover in
    Astronomy 141, setting the stage for how we can make a serious
    scientific inquiry out of the question of whether or not there is life
    elsewhere in the Universe. It is a short lecture, the first half was an
    overview of course mechanics (tests, homework, office hours, etc.) that
    I did not record. Recorded live on 2009 Sep 23 in Room 1005 Smith
    Laboratory on the Columbus campus of The Ohio State University.
    20 min
  • Welcome to Astronomy 141
    Welcome to the Astronomy 141 Lecture Podcasts. This is a brief message
    from me explaining the podcasts, and welcoming new and old listeners.
    University. Lectures will begin on Wednesday, 2009 Sept 23, and run
    through Friday, 2009 Dec 4. New lectures will appear shortly before 6pm
    US Eastern Time each day there is a regular class.
    Recorded live on 2009 Sep 23 in Room 1005 Smith Laboratory on the
    Columbus campus of The Ohio State University.
    0 min

About Astronomy 141 - Life in the Universe - Autumn Quarter 2009

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Astronomy 141, Life in the Universe, is a one-quarter introduction to

Best of Astronomy 141 - Life in the Universe - Autumn Quarter 2009

Ranked by our users in the last 21 days

  1. Number 1: Lecture 46: This View of Life (Course Finale)
    41 min
  2. Number 2: Lecture 45: The Future of Life in the Universe
    45 min
  3. Number 3: Lecture 44: The Future of Life in the Solar System
    56 min

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