Lyceum & Book Club - Week 63

Watch Videos:

O'Neill Cylinders 101 | Deep space colony - 14.01 min

Animal Science TV

What If We Built an O'Neill Cylinder? - 4.59 min

What if

Read Articles:

Space Colonies - The Stanford Torus and Beyond

https://www.core77.com/posts/39727/Space-Colony-Form-Factors-Part-3-The-Stanford-Torus-and-Beyond

From wiki - Bernal Sphere

A Bernal sphere is a type of space habitat intended as a long-term home for permanent residents, first proposed in 1929 by John Desmond Bernal.

Bernal's original proposal described a hollow non-rotating spherical shell 10 mi in diameter, with a target population of 20,000 to 30,000 people. The Bernal sphere would be filled with air.

O'Neill versions

Island One

In a series of studies held at Stanford University in 1975 and 1976 with the purpose of speculating on designs for future space colonies, Dr. Gerard K. O'Neill proposed Island One, a modified Bernal sphere with a diameter of only 500 m (1,600 ft) rotating at 1.9 RPM to produce a full Earth artificial gravity at the sphere's equator. The result would be an interior landscape that would resemble a large valley running all the way around the equator of the sphere. Island One would be capable of providing living and recreation space for a population of approximately 10,000 people, with a "Crystal Palace" habitat used for agriculture. Sunlight was to be provided to the interior of the sphere using external mirrors to direct it in through large windows near the poles. The form of a sphere was chosen for its optimum ability to contain air pressure and its optimum mass-efficiency at providing radiation shielding.

Island Two

O'Neill envisioned the next generation of space habitat as a larger version of Island One. Island Two would be approximately 1800 meters in diameter, yielding an equatorial circumference of nearly six and a half kilometers (four miles). The size was driven by economics; the habitat was to be small enough to allow for efficient transportation within the habitat and large enough to support an efficient industrial base.

Wiki - McKendree Cylinder

A McKendree cylinder is a type of hypothetical rotating space habitat originally proposed at NASA's Turning Goals into Reality conference in 2000 by NASA engineer Tom McKendree. As with other space habitat designs, the cylinder would spin to produce artificial gravity by way of centrifugal force. The design differs from the classical designs produced in the 1970s by Gerard K. O'Neill and NASA in that it would use carbon nanotubes instead of steel, allowing the habitat to be built much larger. In the original proposal, the habitat would consist of a cylinder approximately 290 mi in radius and 2,900 mi in length, containing 5 million sq mi of living space, nearly as much land area as that of Russia.

As originally proposed, the McKendree cylinder is simply a scaled-up version of the O'Neill cylinder. Like the O'Neill cylinder, McKendree proposed dedicating half of the surface of the colony to windows, allowing direct illumination of the interior.[1] The habitat would be composed of a pair of counter-rotating cylinders which would function like momentum wheels to control the habitat's orientation.

Watch Videos:

Theoretical Megastructures we Might One Day See - 11.38 min

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