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  • SPACE SCIENCES  (183)
  • ASTROPHYSICS  (74)
  • AIRCRAFT PROPULSION AND POWER
  • 1975-1979  (125)
  • 1970-1974  (183)
  • 1965-1969
  • 1978  (125)
  • 1970  (183)
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  • 1975-1979  (125)
  • 1970-1974  (183)
  • 1965-1969
Year
  • 1
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    Why go to the outer planets (1970)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Scientific motivation for outer planets exploration covering solar system clues, atmosphere comparisons with earth, radiation and planetary radii measurement, etc
    Keywords: SPACE SCIENCES
    Type: ; ADEMIE DES SCIENCES
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    S-band occultation experiment for Mariner Mars 1971 (1970)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: S band occultation experiment for Mariner Mars 1971 orbiters, measuring atmospheric density and ionospheric electron density profiles
    Keywords: SPACE SCIENCES
    Type: ; YAL SOCIETY (
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Jupiter - His limb darkening and the magnitude of his internal energy source (1970)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Jupiter luminosity as indication of internal energy magnitude, comparing limb darkening with predicted brightness distribution
    Keywords: SPACE SCIENCES
    Type: ; YSICA STATUS SOLIDI
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Interplanetary propagation of flare-associated energetic particles (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A propagation model which combines a Gaussian profile for particle release from the sun, with interplanetary particle densities predicted by focused diffusion, was proposed to explain the propagation history of flare associated energetic particles. This model, which depends on only two parameters, successfully describes the time-intensity profiles of 30 proton and electron events originating from the western hemisphere of the sun. Generally, particles are released from the sun over a finite interval. In almost all events, particle release begins at the time of flare acceleration.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-79534
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Photometric and spectroscopic observations of infrared stars (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Bright IR stars observed using photometry and spectroscopy, suggesting protostars presence
    Keywords: SPACE SCIENCES
    Type: ; YSICA STATUS SOLIDI
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    The velocity distribution of interstellar gas observed in strong UV absorption lines (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Observations of three strong interstellar UV absorption lines of N I (1199 A), N II (1083 A), and Si III (1206 A) in 47 stars of widely varying distance and a variety of spectral types are analyzed to obtain a velocity distribution function for the interstellar gas. A technique based on the maximum and minimum velocities observed along a line of sight is adopted because of heavy line blending, and results are discussed for both power-law and exponential distribution functions. The expected distribution of radiative-phase supernova remnants (SNRs) in the interstellar medium is calculated as a function of SNR birthrate and of the interstellar density in which they evolve. The results are combined with observed distance estimates, and it is shown that an interstellar density in excess of 0.1 per cu cm would be required to keep the SNRs sufficiently confined so that their cross sections are consistent with the observed number of components. The alternative possibility is considered that SNRs do not enter the radiative phase before escaping from the Galaxy or colliding with neighboring remnants.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; vol. 223
    Format: text
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  • 7
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    Intermediate-velocity gas in the local interstellar medium (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Scans of interstellar ultraviolet absorption lines of N I, N II, and Si III for 17 stars are combined with previously published data for 30 stars. The extremal velocities at which detectable absorption occurs are tabulated, and it is shown that these are correlated for the three species. The data suggest that intermediate-velocity gas (20 to 60 km/s), best known from Na I and Ca II absorption, contains both neutral and ionized hydrogen. Features characteristic of intermediate-velocity isothermal shocks (greater than 60 km/s) are conspicuously rare. The intermediate-velocity gas may be in the form of clouds containing both H I and H II regions or of radiative shocks propagating in the interstellar medium; in the latter case the gas should be detectable in H-alpha emission.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; vol. 220
    Format: text
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  • 8
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    Mascons and lunar gravity (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Lunar surface mascon structure and origin from mass estimates, noting contributions to lunar gravity field variations
    Keywords: SPACE SCIENCES
    Type: ; YAL SOCIETY (
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    NASA TECHNICAL REPORTS
  • 9
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    Mineralogic and isotopic investigation on lunar rock 12013 (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Apollo 12 lunar rock 12013 petrologic and mineralogic characteristics, discussing data on isotopic Xe and Gd composition
    Keywords: SPACE SCIENCES
    Type: ; ADEMIE DES SCIENCES
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    NASA TECHNICAL REPORTS
  • 10
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    Refractory grain destruction in low-velocity shocks (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Recent abundance determinations in intermediate-velocity clouds near the Orion association have shown that silicon abundances may be nearly cosmic even in clouds with a velocity as low as 40 to 50 km/sec. It is argued that grain destruction in radiative shocks traveling perpendicular to the magnetic field may be much more effective than was previously considered. The destruction mechanism consists of acceleration of the gyromotion of the grains about their drift center owing to magnetic field compression, followed by sputtering of the high-velocity grains by He and (CNO) atoms. It is found that MgSiO3 grains may be almost fully destroyed in shocks of velocity greater than 80 km/sec and graphite grains substantially destroyed at shock velocities of 100 km/sec.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; vol. 225
    Format: text
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