Bernal+sphere

=**Bernal Sphere**=

= = = Bernal sphere = From Wikipedia, the free encyclopedia (Redirected from [|Island one] )       External view of a Bernal sphere          The inside of the sphere as viewed from the sunlight "portal" 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 spherical shell 1.6 km (1 mile) in diameter, with a target population of 20,000 to 30,000 people. The Bernal sphere would be filled with [|air]. [ [|hide] ] *  [|1 Island One]
 * //Project Type// || Unknown ||
 * //Operating body// || Unknown ||
 * //Host Nation// || Unknown ||
 * //Program cost// || Unknown ||
 * //Cost per vehicle// || Unknown ||
 * //Life support// || Unknown ||
 * //Status// || Unknown ||
 * == Contents ==
 * [|2 Island Two]
 * [|3 See also]
 * [|4 References]
 * [|5 External links] ||

[ [|edit] ] 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], [|Gerard Kitchen O'Neill] proposed//Island One,// a modified Bernal sphere with a diameter of only 500m 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 ten thousand 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]. [|[1]]

[ [|edit] ] 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). At this size, the habitat could comfortably house a population of some 140,000 people. 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. [|[2]]

[ [|edit] ] See also

 * = [[image:http://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png width="30" height="40"]] || Wikimedia Commons has media related to: //** [|Bernal sphere] **// ||
 * [|Space Colony ARK], a fictional Bernal sphere colony in the //Sonic the Hedgehog// video games (however, in // [|Sonic Adventure 2] //, it was incorrectly called a "Bernoulli sphere")
 * Gagarin Station, a fictional Bernal sphere colony in the // [|Mass Effect] // video games
 * [|O'Neill cylinder] aka the "Island III", the brother design to the "Island I"
 * // [|Rendezvous with Rama] //

[ [|edit] ] References

 * 1) ** [|^] ** O'Neill, Gerard K., //The High Frontier//, third edition. Apogee Books, 2000.
 * 2) ** [|^] ** //ibid//. pp 93