Results 121 to 130 of about 7,047 (224)

Ion Propulsion Module (IPM) technology readiness assessment: 1985 Halley's Comet rendezvous mission [PDF]

open access: yes
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.
core   +1 more source

The 15 years of comet photometry: A comparative analysis of 80 comets [PDF]

open access: yes
In 1976, a program of narrowband photometry of comets was initiated that has encompassed well over 400 nights of observations. To date, the program has provided detailed information on 80 comets, 11 of which were observed during multiple apparitions. The
Ahearn, Michael F.   +4 more
core   +1 more source

Determination of the observation conditions of celestial bodies with the aid of the DISPO system [PDF]

open access: yes
The interactive system for determining the observation conditions of celestial bodies is described. A system of programs was created containing a part of the DISPO Display Interative System of Orbit Planning.
Kazakov, R. K., Krivov, A. V.
core   +1 more source

Edmund Halley (1656-1742). [PDF]

open access: yesJ Neurol Neurosurg Psychiatry, 1992
Haas LF.
europepmc   +1 more source

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