Results 81 to 90 of about 3,964 (181)
Solar nebula condensates and the composition of comets [PDF]
Interpretation of the volatile abundances in Halley's comet in terms of models for chemical and physical processes in the solar nebula are discussed.
Lunine, J. I.
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III. Observations for determining the positions of Halley's Comet [PDF]
R. Owen +3 more
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Sublimation rates of carbon monoxide and carbon dioxide from comets at large heliocentric distances [PDF]
Using a simple model for outgassing from a small flat surface area, the sublimation rates of carbon monoxide and carbon dioxide, two species more volatile than water ice that are known to be present in comets, are calculated for a suddenly activated ...
Sekanina, Zdenek
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Edmund Halley (1656-1742). [PDF]
J Neurol Neurosurg Psychiatry, 1992 Haas LF.
europepmc +1 more source
Ion Propulsion Module (IPM) technology readiness assessment: 1985 Halley's Comet rendezvous mission [PDF]
An assessment of the risk of utilizing ion propulsion to perform a rendezvous mission with Halley's comet in 1985 is presented, and consideration recommendations for reducing identified risks to the lowest possible level at project start in October 1978 ...
West, J.
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Report of the Terrestrial Bodies Science Working Group. Volume 1: Executive summary [PDF]
Current knowledge of Mercury, Venus, Mars, the Moon, asteroids, comets, and the Galilean satellites were reviewed along with related NASA programs and available mission concepts.
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Description and validation of a test to evaluate sustained silent reading. [PDF]
Invest Ophthalmol Vis Sci, 2013 Ramulu PY +3 more
europepmc +1 more source