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.
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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.
What are the properties of the 400+ exoplanets we have discovered so
far? This lecture reviews the properties of exoplanets, and finds a
couple of surprises: Jupiter-mass planets orbiting close to their parent
stars, and Jupiter-mass planets in very elliptical orbits. Both seem to
require some mechanism for migration: strong gravitational interactions
with either the protoplanetary disk or other giant planets to cause the
planets to move inward from their birth places beyond the "Ice Line".
We will then briefly discuss why we are seeing systems very different
from our own, mostly we think a selection effect due to our search
methods to date. Microlensing, however, is more sensitive to systems
like ours, and is starting to find them. Earths, however, remain
elusive so far, but the hunt is on. Recorded live on 2009 Nov 18 in
Room 1005 Smith Laboratory on the Columbus campus of The Ohio State
University.
Astronomy 141 - Life in the Universe
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.