Guide to the Cosmos on WebTalkRadio  Hosted by Dr. Robert Piccioni    image #1 Chichen Itza Great Pyramid image #2 Mayan Astronomical Observatory at Chichen Itza   Will the World End in 2012? What celestial event caused the Mayans to construct a calendar that ended on that date? Do we need to worry?

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Click here for the Broadcast Image Gallery image #3 NASA / Caltech reconstucted image of our Milky Way galaxy as would be seen from far away. image #4 Intersection of the central planes of the Milky Way and our Solar System's Ecliptic. image #5 Relative acceleration of gravity at Earth's surface from various celestial bodies.