Designing dual-plate meteoroid shields: A new analysis [PDF]
Physics governing ultrahigh velocity impacts onto dual-plate meteor armor is discussed. Meteoroid shield design methodologies are considered: failure mechanisms, qualitative features of effective meteoroid shield designs, evaluating/processing meteoroid ...
Bamford, R., Chen, R., Swift, H. F.
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Scientific rationale and strategies for a first comet mission. Report of the Comet Halley science working group. An executive summary [PDF]
The justification, scientific objectives, instrumentation, and strategy for a first comet mission are discussed. Topics include: mission target; rendezous, propulsion system requirements, measurement objectives, instrument capabilities for rendezvous ...
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On predictions and laws in biological evolution: Is biology able to formulate general laws and develop inductive predictions as in physics or chemistry?: Is biology able to formulate general laws and develop inductive predictions as in physics or chemistry? [PDF]
EMBO Rep, 2022 Rull V.
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Coordinated programs for comet Halley [PDF]
Symposium - International Astronomical Union, 1986 Because comets are so difficult to observe, it is essential to coordinate observations from a variety of telescopes in order to fully understand their behavior. The apparition of Comet Halley represents a unique opportunity for coordinated programs because this is the only predictable comet which is routinely bright enough for the many observational ...
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Opportunities for ballistic missions to Halley's comet [PDF]
Alternative strategies for ballistic missions to Halley's comet in 1985-86 are described. It is shown that a large science return would be acquired from a ballistic Halley intercept in spite of the high flyby speeds of almost 60 km/sec that are ...
Farquhar, R. W., Wooden, W. H., II
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The spectral appearance of comets from 5 to 20 micrometers: A survey of the data [PDF]
Based on the concept of comets as being conglomerates of rocks and ices, it is expected that they reflect these components in their emission spectra. Silicate materials (rocks) are common in many astronomical environments and show prominent features at ...
Bregman, Jesse D.
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Influence of solar activity upon light curves of comets P/Halley (1986 3) and P/Churyumov-Gerasimenko (1982 8) [PDF]
It is shown that the comet P/Halley's (1986 3) total magnitudes correlate with changes in the solar activity indices and the solar wind velocity. A statistically reliable correlation between the outbursts of brightness and magnitude variations of the ...
Churyumov, Klim I., Filonenko, V. S.
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Edmond Halley's Contributions to Hydrogeology. [PDF]
Ground Water, 2021 Deming D.
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Excerpts from solar sail concepts and applications [PDF]
Material applicable to Mars missions are excerpted from an earlier study covering a broader range of applications of solar sails. The basic principles of solar sail operation are provided, and the implications on trajectories and mission are discussed ...
Sauer, Carl +2 more
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The dynamical history of comet Halley [PDF]
International Astronomical Union Colloquium, 1985 AbstractThe history of the attempts to predict the motion of comet Halley is outlined and the importance of the so-called nongravitational forces acting upon this comet is emphasized. Recent orbital work of the International Halley Watch Astrometry Network is reviewed. Comet Halley’s transverse nongravitational parameter is positive and nearly constant
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