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  • 1
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    Systematic aspects of direct extrasolar planet detection (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Using the first optical observatory in space, the Hubble Space Telescope, images of possible extrasolar planets will have poor contrast against the background of diffracted and scattered starlight. The very long exposure time required to achieve an adequate signal-to-noise ratio will make their detection infeasible. For a future telescope, a 16-fold increase in either the smoothness of the collecting area of the optics would reduce the exposure time to a tolerable value, but the contrast would remain low and the required photometric precision high. In this situation, the feasibility of detection would be contingent on the careful identification and control of systematic errors.
    Keywords: ASTRONOMY
    Type: Bioastronomy - The next steps; Jun 22, 1987 - Jun 27, 1987; Balaton; Hungary
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Space Station Freedom - A resource for aerospace education (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The role of the International Space Station in future U.S. aerospace education efforts is discussed from a NASA perspective. The overall design concept and scientific and technological goals of the Space Station are reviewed, and particular attention is given to education projects such as the Davis Planetarium Student Space Station, the Starship McCullough, the Space Habitat, the working Space Station model in Austin, TX, the Challenger Center for Space Life Education, Space M+A+X, and the Space Science Student Involvement Program. Also examined are learning-theory aspects of aerospace education: child vs adult learners, educational objectives, teaching methods, and instructional materials.
    Keywords: SOCIAL SCIENCES (GENERAL)
    Type: IAF PAPER 88-467
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Voyager observations of 1985U1 (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: During its discovery of the 75-km average diameter Uranian satellite 1985U1, between the epsilon ring and Miranda, Voyager was able to resolve this irregularly shaped satellite in sufficiently great detail to allow the determination of its size, shape, and photometric properties. It is presently noted that 1985U1's albedo, at between 0.07 and 0.09, is both substantially lower than those obtained for the large Uranian satellites and slightly higher than that of the Saturn moon, Phoebe. A V-system opposition magnitude of about +20.5 is conjectured.
    Keywords: ASTRONOMY
    Type: Icarus (ISSN 0019-1035); 72; 79-83
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Scientific Literacy for the 21st Century (SL-21) (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: A proposal called, 'Scientific Literacy for the 21st Century (SL-21)', has been introduced, suggesting ways in which NASA may work to increase scientific literacy in the U.S. The future need for an adequate supply of scientists and engineers for the space program is discussed. The principles of the SL-21 proposal are outlined. The program would emphasize education in the fields of space technologies and earth and planetary sciences. The educational elements of the proposal for teachers, students, universities, and the general adult population are described.
    Keywords: SOCIAL SCIENCES (GENERAL)
    Type: IAF PAPER 89-557
    Format: text
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    NASA TECHNICAL REPORTS
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