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Planning permission or building permit refers to the approval needed for construction or expansion (including significant renovation), and sometimes for demolition, in some jurisdictions. [ 1 ] [ 2 ] House building permits, for example, are subject to building codes .
The lunar far side lacks direct communication with Earth, though a communication satellite at the L 2 Lagrangian point, or a network of orbiting satellites, could enable communication between the far side of the Moon and Earth. [50] The far side is also a good location for a large radio telescope because it is well shielded from the Earth. [51]
The procedure and requirements for the certificate vary widely from jurisdiction to jurisdiction and on the type of structure. In the United States, obtaining a certificate is generally required whenever: a new building is constructed; a building built for one use is to be used for another (e.g., an industrial building converted for residential ...
These are known as by-right uses. Then there is an extra set of uses known as special uses. To build a use that is listed as a special use, a special-use permit (or conditional-use permit) must be obtained. An example of a special-use permit may be found in a church applying for one to construct a church building in a residential neighborhood ...
The distance to the moon was directly measured by means of radar first in 1946 as part of Project Diana. [48] Later, an experiment was conducted in 1957 at the U.S. Naval Research Laboratory that used the echo from radar signals to determine the Earth-Moon distance. Radar pulses lasting 2 μs were broadcast from a 50-foot (15 m) diameter radio ...
A Stanford torus interior (cutaway view) Interior view of a large scale O'Neill cylinder, showing alternating land and window stripes. A space settlement (also called a space habitat, spacestead, space city or space colony) is a settlement in outer space, sustaining more extensively habitation facilities in space than a general space station or spacecraft.
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[6] While I-HAB is still planned to launch on NASA's Space Launch System, the size and weight of the module were constrained by the possibility of its launch vehicle being switched to SpaceX's Falcon Heavy. [6] [9] The inner diameter was reduced from 4.2 meters to 3.4 meters, and internal length reduced from 6.6 meters to 5.9 meters. [6]