Results 51 to 60 of about 2,988 (164)
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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Halley's Comet and others: the bacterial star shells. [PDF]
J R Soc Med, 1986 Hoyle F.
europepmc +1 more source
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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Views of the large-scale structure of the solar system, consisting of the Sun, the nine planets and their satellites, changed when Oort demonstrated that a gigantic cloud of comets (the Oort cloud) is located on the periphery of the solar system.
Marochnik, Leonid S. +2 more
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Investigation of plasma density bulge in front of Venus bow shock [PDF]
Significant ion and electron flux enhancements immediately upstream of the Venus bow shock were observed by the Electron Temperature Probe on the Pioneer Venus Orbiter.
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Likely Transiting Exocomets Detected By <i>Kepler</i>. [PDF]
Mon Not R Astron Soc, 2018 Rappaport S +10 more
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Modeling the surface and interior structure of comet nuclei using a multidisciplinary approach [PDF]
The goal was to investigate the structural properties of the surface of comet nucleus and how the surface should change with time under effect of solar radiation.
Dakoulas, Panos C. +2 more
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Extended atmospheres of comets and outer planet-satellite systems [PDF]
For the hydrogen coma of comet P/Halley, both a Lyman-alpha image and extensive Lyman-alpha scan data obtained by the Pioneer Venus Orbiter Ultraviolet spectrometer as well as H-alpha ground-based spectral observations obtained by the University of ...
Marconi, Max L., Smyth, William H.
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Charge exchange in cometary coma: Discovery of H- ions in the solar wind close to comet 67P/Churyumov-Gerasimenko. [PDF]
Geophys Res Lett, 2015 Burch JL +6 more
europepmc +1 more source