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Wednesday, October 24, 2007

The Hubble Deep Field: The Most Important Image Ever Taken

How big is the Universe?

Ancient Sumerian Astronomy

Astronomy Lecture - Stellar Evolution

Astronomy Lecture

Astronomy Lecture - the Planets

Astronomy/Physics Lecture - General Relativity

Simultaneity - Albert Einstein and the Theory of Relativity

General Relativity: gravitational waves

General relativity & Gravity

Einstein, Gravity and the Expanding Universe