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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 International VEGA "Venus-Halley" (1984-1986) Experiment: Description and Scientific Objectives [PDF]
The Venus-Halley (Vega) project will provide a unique opportunity to combine a mission over Venus with a transfer flight to Halley's comet. This project is based on three research goals: (1) to study the surface of Venus; (2) to study the air circulation
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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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Edmond Halley's Contributions to Hydrogeology. [PDF]
Ground Water, 2021 Deming D.
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The Ancient Astronomy of Easter Island: The Mamari Tablet Tells (Part 1) [PDF]
arXiv, 2016 The ancient priest-astronomers constantly watched many heavenly bodies. The record about Halley's Comet of 1682 A.D. has been decoded completely. Good agreement between it and the results of European astronomers is seen. The records about Halley's Comet of 1835 A.D. as well as about the sun, the moon, Mars and Saturn have been deciphered as well.
arxiv
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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Monthly Notices of the Royal Astronomical Society, 1991 It is suggested that the outburst suffered by Comet Halley (1986 III) in early 1991 February, was caused by the ejection from the nucleus of 1.4 × 10 13 g of dust, this being about 0.02 per cent of the cometary mass. The energy required was in the range 2 × 10 19 to 2 × 10 23 erg.
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The Past Orbit of Halley's Comet [PDF]
Monthly Notices of the Royal Astronomical Society, 1972 I have re-examined the records in the Chinese“Standard Histories”on this famous object, including one set of relatively precise observations made in the year 837 A.D., which has only recently become available in an English translation (Ho 1962). This set, when properly interpreted, consists of the comet’s right ascension on 10 specified dates, given to
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On LAM's and SAM's for Halley's rotation [PDF]
Non principal axis rotation for comet Halley is inferred from dual periodicities evident in the observations. The modes where the spin axis precesses around the axis of minimum moment of inertia (long axis mode or LAM) and where it precesses around the ...
Peale, Stanton J.
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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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