Astronomy Topics (13)
 
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CSC/SETI Institute Colloquium Series 2010
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Introduction to Astrophysics
taught by Joshua Bloom | added 1 year ago | viewed 5,629 times
Astrobiology and Space Exploration (Winter 2010)
taught by Lynn Rothschild | added 1 year ago | viewed 6,193 times
 
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November 6th '11
A new Astronomy documentary was added: The Universe - Season 6, Ep 4: The Moon (2011). 9:26pm
A new Astronomy documentary was added: The Universe - Season 5 (2010). 7:37pm
A new Astronomy documentary was added: The Universe - Season 4 (2009). 6:23pm
A new Astronomy documentary was added: The Universe - Season 3 (2008). 4:48pm
November 5th '11
A new Astronomy documentary was added: Extreme Astronomy: Seeing Stars (2011). 4:15am
February 13th '11
A new Astronomy course was added: Introduction to Astrophysics 1:07pm
January 17th '11
A new Astronomy documentary was added: IMAX Cosmic Voyage (1996). 7:09am
 
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How Eratosthenes calculated Earth's circumference

In the 3rd century BCE, Eratosthenes calculated the circumference of the Earth to high precision.Thi... (see more)

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