Geologic samples returned from the Moon by the
Apollo lunar
surface exploration missions (1969-1972), along with associated
data records, are physically protected, environmentally preserved,
and scientifically processed in a special building dedicated for
that purpose at the Johnson Space Center in Houston, Texas. A
total of 382 kilograms of lunar material, comprising 2200 individual
specimens returned from the Moon, has been processed to meet scientific
requirements into more than 110,000 individually cataloged samples.
Building 31N at Johnson Space Center was constructed from 1977 to
1979 and opened in 1979 to provide for permanent storage of the lunar
sample collection in a physically secure and non-contaminating
environment. The purpose of the facility is to maintain in pristine
condition the lunar samples that comprise a priceless national and
scientific resource while making the samples available to approved
scientists and educators. Approximately 100 people visit the facility
annually for research or educational purposes. Several hundred other
people are served remotely each year by provision of samples for use
in laboratories or classrooms. Untold numbers of people are also
served by the display samples that are prepared in the facility
for loan to public museums and expositions.
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NASA JSC File Photograph S85-36332. Staff scientists
at work in the Lunar Sample Laboratory Facility at NASA JSC.
"Pristine" lunar samples (those continuously in NASA
custody since return from the Moon) are stored and handled in
stainless steel glove cabinets that are purged by high-purity
nitrogen gas to minimize degradation of the samples. Pristine
samples are always separated from human hands by three layers
of gloves.
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NASA JSC File Photograph S82-26777. Staff scientists prepare
to divide a pristine lunar rock inside a nitrogen processing cabinet
in the Lunar Sample Laboratory Facility at NASA JSC. Samples
subdivided for approved research projects are handled with specially
cleaned tools and are sealed under nitrogen before lending to
science customers. Researchers may open and handle the samples
in air if their experiments so require. But leftover sample material,
which must be returned to NASA, is reclassified as "returned"
and is kept separate from pristine samples.
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The facility features storage vaults that stand elevated above anticipated
storm-surge sea level heights to protect the samples from threats
posed by hurricanes and tornadoes. All materials used in constructing
and equipping the building (including
floor coverings, walls, plumbing, light fixtures, and paint) were
carefully screened to exclude chemical elements that would pose
unacceptable contamination threats to the lunar samples.
Preparation of samples for shipment to authorized recipients is
conducted in stainless steel environmental cabinets purged by
high-purity nitrogen that is continuously monitored for oxygen
and moisture contents. The facility also includes rooms to support
sample examinations and experiments by visiting scientists. More
than 60 research laboratories around the world actively pursue
studies of the samples and approximately 400 samples are prepared
and sent to investigators each year. Samples that are not consumed
in analysis are retrieved by NASA as "returned" samples
that are recycled to other users as appropriate.
Lunar samples remain very strong educational magnets that continue
to attract the attention of geologists, chemists, and physicists.
Lunar sample studies have inspired the development of new methods
for chemical and isotopic analysis and have honed the skills of
two professional generations of scientists; the third generation
is well into training in the 1990s.