Results 31 to 40 of about 2,988 (164)
Report of the Terrestrial Bodies Science Working Group. Volume 8: The comets [PDF]
The determination of the nuclear and atmospheric properties of comets, and the interaction of the solar wind with the comet tail are scientific objectives for a mission to one or more comets in the next decade.
Brandt, J. C. +2 more
core +1 more source
Edmond Halley's Contributions to Hydrogeology. [PDF]
Ground Water, 2021 Deming D.
europepmc +1 more source
Influence of solar activity upon light curves of comets P/Halley (1986 3) and P/Churyumov-Gerasimenko (1982 8) [PDF]
It is shown that the comet P/Halley's (1986 3) total magnitudes correlate with changes in the solar activity indices and the solar wind velocity. A statistically reliable correlation between the outbursts of brightness and magnitude variations of the ...
Churyumov, Klim I., Filonenko, V. S.
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The spectral appearance of comets from 5 to 20 micrometers: A survey of the data [PDF]
Based on the concept of comets as being conglomerates of rocks and ices, it is expected that they reflect these components in their emission spectra. Silicate materials (rocks) are common in many astronomical environments and show prominent features at ...
Bregman, Jesse D.
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Excerpts from solar sail concepts and applications [PDF]
Material applicable to Mars missions are excerpted from an earlier study covering a broader range of applications of solar sails. The basic principles of solar sail operation are provided, and the implications on trajectories and mission are discussed ...
Sauer, Carl +2 more
core +1 more source
The 10 micron spectral structure in comets [PDF]
The 10 micron spectra of comets Halley (1982i), Wilson (1986l), Kohoutek (1973f) and Bradfield (1987s) are presented and compared. The silicate emission profiles of Halley and Bradfield are seen to be remarkably similar in that both contain a sharp break
Campins, Humberto +2 more
core +1 more source
The 15 years of comet photometry: A comparative analysis of 80 comets [PDF]
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
87th Annual Meeting of the Meteoritical Society 2025: Abstracts
Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley +1 more source
Space missions to comets [PDF]
The broad impact of a cometary mission is assessed with particular emphasis on scientific interest in a fly-by mission to Halley's comet and a rendezvous with Tempel 2.
Brandt, J. C. +3 more
core +1 more source
The eleven observations of comets between 687 AD and 1114 AD recorded in the Anglo Saxon Chronicle [PDF]
This research paper is an examination of the eleven cometary references (679AD, 729AD, 892AD, 950AD, 975AD, 995AD, 1066AD, 1097AD, 1106AD, 1110AD and 1114AD) found in the various manuscripts of The Anglo Saxon Chronicle between 678 AD and 1114 AD.
Mardon, A. A. +2 more
core +1 more source