Back in 1980, Carl Sagan created his seminal Cosmos: A Personal Voyage series for PBS (I reviewed the DVD release here). It has stood the test of time, especially considering the discoveries that have been made in the intervening decades. In this clip from the series, Sagan looks at the 4th dimension and the Tesseract – a 3-dimensional shadow of a 4-dimensional hypercube:
Filed under: Introduction to Astronomy
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Animations of NASA’s Mars 2020 Perseverance Rover Landing
NASA Is Providing Spanish-Language Coverage for the Livestream of the December 14 Solar Eclipse
NASA Names Artemis Team of Astronauts Eligible for Early Moon Missions
The Sun Now (Visible light)
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The Sun Now (H-Alpha light)
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Aurora Oval
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Aurora Oval
(Southern Hemisphere) |
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