Results 1 to 10 of about 2,949 (126)
Nature, 1910 I DO not know if the enclosed is of any general interest or not; it is an attempt to photograph Halley's comet (as seen here) without any special apparatus. The tail was about 90° long on May 17, and probably 115° on May 18, taking the calculated position of the nucleus, which had not risen when dawn came.
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Annual Meeting Optical Society of America, 1985 Halley’s Comet has been under surveillance since it was spotted with an advanced detector on the 200-in. telescope in October 1982. It has since shown unexpected variations. We want to know the nature of the frozen nucleus of the comet and the mostly unidentified parent molecules that compose it.
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Mission strategy for cometary exploration in the 1980's [PDF]
A sequence of ballistic intercept missions to comets is proposed. The mission set is composed of a well-known group of periodic comets whose physical properties are dissimilar. In addition to full descriptions of the nominal mission profiles, earth-based
Farquhar, R. W.
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Seeing Halley's Comet: A guide for observers in the Northern Hemisphere [PDF]
A guide for the observation of Halley's comet is presented. The path of the comet is described for the fly by dates and charts are provided for location of the comet in the morning or evening skies.
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Comet Halley and history [PDF]
A history of Halley's Comet is presented.
Marsden, B. G.
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Solar array conceptual design for the Halley's Comet ion drive mission, phase 2 [PDF]
Conceptual design studies were performed directed toward a high power, ultralightweight solar array, compatible with the requirements for the Halley's Comet Ion Drive Mission.
Rayl, G. J. +2 more
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Halley's comet 1985-86: space exploration [PDF]
A coordinated program to explore Halley's comet in 1985 to 86 is proposed. The program employs a variety of observational systems for remote observations and utilizes spacecraft encounters with the comet to obtain in-situ measurements.
Farquhar, R. W., Wooden, W. H., II
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The study of the physics of cometary nuclei [PDF]
The numerical calculations of stability for many possible orbits of the double nucleus for P/Holmes showed that the likelihood of such a precollision history was quite high.
Whipple, Fred L.
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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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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.
europepmc +1 more source