Island Universes: Discovering Galaxies Beyond the Milky Way The discovery that we live in an ordinary galaxy, one...
The Search for Extra-Terrestrial Intelligence in the New Millennium The lecture will describe our attempts to detect the presence...
The Limits of Our Knowledge There is much in the universe we will never know, and it is equally certain that we will never know all that we do not know.
50 Years of Lunar Exploration Professor Silk will describe the history of lunar exploration since 1969 and future plans for the Moon.
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