Glossary 



Apollo: A NASA project consisting of 17 manned flights for Earth orbital, 

 circumlunar, and lunar missions. 



Artificial gravity: Space-based simulation of the normal terrestrial gravitational 

 field by creating a vector acceleration of 9.8 m/sec\ See variable-gravity centrifuge. 



Biocosmos: A series of Cosmos-class satellites launched by the U.S.S.R. The 

 experiments, contributed by Soviet and international cooperators, are designed to 

 study the effects of space flight on living organisms. 



Commercially Developed Space Facility (CDSF): A spacecraft being developed 

 by commercial partners as a permanently deployed, crew-tended space platform 

 for materials research and manufacturing, scientific research, and storage, and as a 

 test platform and laboratory. The craft consists of a facility module, auxiliary 

 module, and a docking system. Astronauts will work within the pressurized "shirt 

 sleeve" environment of the facility module during servicing; the craft will operate 

 as an autonomous free-flier between visits. 



Extravehicular activity (EVA): Activities by crew members conducted outside the 

 pressurized hull of a spacecraft. 



Free-flier: Any payload detached from another spacecraft during the operational 

 phase of that payload and capable of independent operation. 



Gemini: A NASA project consisting of 10 manned flights during 1965-1966. The 

 project tested technologies for long-duration flight, rendezvous, docking, target 

 vehicle propulsion, extravehicular activity and guided reentry. 



Gravity: The acceleration field associated with the mass of the Earth; approxi- 

 mately 9.8 ml sec on the Earth's surface. 



Health Maintenance Facility (HMF): A structure developed to house preventive, 

 diagnostic, and therapeutic medical instrumentation for use on the Space Station. 



Lifesat: A proposed NASA free-flier program to establish a flight and recovery 

 capability for gravitational biology and related research. 



Mainbelt asteroid: A mixture of primitive and evolved objects found in a 

 transition region between the inner (rocky) planets and the outer (gaseous and 

 icy) planets. The objects in this zone have apparently preserved an ordered 

 structure related to the original temperature/pressure regime of the solar nebula. 



Medicine Policy Board: A panel led by the Director of Life Sciences at NASA 

 Headquarters and responsible for medical policies relative to the development, 

 publication, implementation, and revision of medical standards for NASA space 

 crews. 



Microwave Observing Project (MOP): A major focus of the Search for 

 Extraterrestrial Intelligence (SETI) Program which, when fully implemented, will 

 permit a search for signals of natural and artificial origin over the entire sky at 

 frequencies between 1 and 10 GHz, with a maximum sensitivity of E-10 B W/m 2 , 

 and selected searches in the 1 to 3 GHz range with a maximum sensitivity of 

 E-lO^W/m 2 . 



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