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  • 1970-1974  (19)
  • 1
    Electronic Resource
    Electronic Resource
    Stardust (1972)
    [s.l.] : Nature Publishing Group
    Nature 238 (1972), S. 256-260 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Heavy metal particles have been detected in noctilucent clouds. Possible sources for these particles are considered and a solar origin is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/238256a0
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Stardust (1972)
    Springer Nature
    Details
    Publication Date: 1972-08-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
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    PAPER CURRENT
  • 3
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    Preliminary examination of Surveyor 3 components for impact phenomena (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Two pieces of the Surveyor 3 spacecraft recovered during the Apollo 12 mission were examined for secondary lunar ejecta and micrometeorite impacts. One piece was section E of the aluminum strut; the other was the nickel-coated beryllium television camera mirror.
    Keywords: SPACE SCIENCES
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 151-153
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Experiment S010: Agena micrometeorite collection (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A study was made of the micrometeoroid content of the upper atmosphere and the near-earth space environment. Highly polished collection surfaces attached to the target docking adapter (TDA) were exposed to micrometeorite impact and debris collection during the Gemini 8, 9, and 10 missions. Also, the device was attached to the Gemini Agena target vehicle (GATV) during the Gemini 12 mission. The effects of space environment exposure on viable microorganisms were recorded. No substantive data regarding space environment micrometeorite content were derived from the Gemini 9 or 12 missions. However, some substantive data were obtained from the experiment package that was retrieved from the Gemini 10 mission. The micrometeorite-flux values obtained were in general agreement with values obtained from previous experiments by the use of other experimental equipment. The microorganisms that were retrieved from the Gemini 10 experiment package did not survive. However, the same kinds of specimens inside the package had good survival rates. Upon initial analysis, it appeared that the closed-cover shielding was a contributing factor in the protection and survival of the microorganisms.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center The Gemini Program: Phys. Sci. Expt. Sum.; p 303-312
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    NASA TECHNICAL REPORTS
  • 5
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    Experiment S030: Dim sky photography/orthicon (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: During Gemini missions, the image orthicon system was used to obtain photographic data on faint and diffuse astronomical phenomena. Results show that the photographs may be used to determine the airglow geometry. Although it was sensitive, the original photographic system was unsuitable for use in the study of dim and diffuse astronomical light sources.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: The Gemini Program: Phys. Sci. Expt. Sum.; p 445-454
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  • 6
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    Experiment S012: Micrometeorite collection (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The micrometeorite activity in a near-earth environment and the effect of the environment on microorganisms were studied by exposure of polished metal and plastic surfaces to the environment outside the Gemini spacecraft. Preliminary results are summarized as follows: (1) The cumulative influx rate in the size ranges from 10 to the minus 15th power to 10 to the minus 14th power gram was approximately 2 particles/ sq m/sec, as determined on the Gemini 12 mission; (2) The cumulative influx rate in the same mass range, as determined by the data from the Gemini 9 mission was almost 200 particles/ sq m/sec; and (3) The large particle cumulative influx rate was about 3 x 0.00001 particle/ sq m/sec, with a mass of the order of 10 to the minus 7th power gram. No living organisms could be found on the sterile collecting surfaces after recovery and handling.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center The Gemini Program: Phys. Sci. Expt. Sum.; p 313-336
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  • 7
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    Stardust. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Rocket experiments were conducted to collect particles from noctilucent clouds at Kiruna, Sweden. The Pandora II inflight shadowing technique considered by Hallgren and Hemenway (1971) was used in the experiments. This technique makes it possible to study the collected particles as a function of time and altitude intervals. The particles observed consisted of an irregular electron-opaque core surrounded by a rounded, low density material. X-ray and electron opacity data suggest that the abundances of the heavy elements, such as Hf and Ta, in the particles are comparable to those of the light elements, such as Al and Si.
    Keywords: SPACE RADIATION
    Type: Nature; 238; Aug. 4
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Image-orthicon spectra of Geminids in 1969 (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The spectra of 25 meteors, recorded with an image orthicon technique in December 1969, are studied in relation to similar records made in August of the same year. Of 19 Geminid meteors in the absolute visual magnitude range 0 to +2, only one showed any evidence of the forbidden line of oxygen at 5577 A, while all Perseid meteors recorded in August exhibited the oxygen line, a result of the large difference in geocentric velocity between the two showers. Atoms identified in faint Geminid meteors include neutral iron, magnesium, calcium and sodium. The molecular bands of nitrogen are also observed.
    Keywords: SPACE SCIENCES
    Type: NASA, Washington Evolutionary and Phys. Properties of Meteoroids; p 147-151
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Unusual chemical compositions of noctilucent-cloud particle nuclei (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Two sounding rocket payloads were launched from the ESRO range in Sweden during a noctilucent cloud display. Large numbers of submicron particles were collected, most of which appear to be made up of a high density material coated with a low density material. Typical electron micrographs are shown. Particle chemical compositions have been measured by use of dispersive X-ray analysis equipment attached to an electron microscope and have revealed that most of the high density particle nuclei have atomic weights greater than iron.
    Keywords: SPACE SCIENCES
    Type: NASA, Washington Evolutionary and Phys. Properties of Meteoroids; p 287-290
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  • 10
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    An unusual meteor spectrum (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: An extraordinary spectrum of a meteor at a velocity of about 18.5 + or - 1.0 km/s was observed with an image orthicon camera. The radiant of the meteor was at an altitude of about 49 deg. It was first seen showing a yellow red continuous spectrum alone at a height of 137 + or - 8 km which is ascribed to the first positive group of nitrogen bands. After the meteor had descended to 116 + or - 6 km above sea level it brightened rapidly from its previous threshold brightness into a uniform continuum, the D-line of neutral sodium appeared, and at height 105 + or - 5 km all the other lines of the spectrum also appeared. The continuum remained dominant to the end. Water of hydration and entrained carbon flakes of characteristic dimension about 0.2 micron or less are proposed as constituents of the meteoroid to explain these phenomena.
    Keywords: SPACE SCIENCES
    Type: NASA, Washington Evolutionary and Phys. Properties of Meteoroids; p 153-159
    Format: application/pdf
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