What is a dimension? In 3D...and 2D... and 1D

1D - it's the new 3D!

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Yale: Frontiers and Controversies in Astrophysics, Lecture 21

Class begins with a review of the mysterious nature of dark matter, which accounts for three quarters of the universe. Different models of the universe are graphed. The nature, frequency, and duration of supernovae are then addressed. Professor Bailyn presents data from the Supernova Cosmology Project and pictures of supernovae taken by the Hubble Space Telescope. The discovery of dark energy is revisited and the density of dark energy is calculated. The Big Rip is presented as an alternative hypothesis for the fate of the universe.

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Black Holes - Sixty Symbols

Crushing the Earth into a Black Hole and looking into the core of the Milky Way.

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Magnets and Their Attractions for Technology

How do scientists and engineers use magnets? What do magnets promise for the future? See for yourself what's involved in tapping one of nature's fundamental forces: electromagnetism.

Speaker: Dr. Leigh Harwood, CEBAF
Date: December 11, 1991

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Afterschool Universe: Supernova Can Crunch

A soda can collapsing under atmospheric pressure is similar to a star collapsing when fusion no longer equilibrates gravitation.

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