IUE observations of comet Halley during the Vega and Giotto encounters

Nature ◽  
1986 ◽  
Vol 321 (S6067) ◽  
pp. 361-363 ◽  
Author(s):  
M. C. Festou ◽  
P. D. Feldman ◽  
M. F. A'Hearn ◽  
C. Arpigny ◽  
C. B. Cosmovici ◽  
...  
Keyword(s):  
Comet Halley

Hydrogen Cyanide Polymers from the Impact of Comet P/Shoemaker-Levy 9 on Jupiter

1997 ◽  
Vol 161 ◽  
pp. 179-187
Author(s):  
Clifford N. Matthews ◽  
Rose A. Pesce-Rodriguez ◽  
Shirley A. Liebman
Keyword(s):  
Amino Acids ◽  
Solar System ◽  
Hydrogen Cyanide ◽  
Nitrogen Heterocycles ◽  
Laboratory Studies ◽  
Heterogeneous Solids ◽  
The Many ◽  
Comet Halley ◽  
The Impact ◽  
By Products

AbstractHydrogen cyanide polymers – heterogeneous solids ranging in color from yellow to orange to brown to black – may be among the organic macromolecules most readily formed within the Solar System. The non-volatile black crust of comet Halley, for example, as well as the extensive orangebrown streaks in the atmosphere of Jupiter, might consist largely of such polymers synthesized from HCN formed by photolysis of methane and ammonia, the color observed depending on the concentration of HCN involved. Laboratory studies of these ubiquitous compounds point to the presence of polyamidine structures synthesized directly from hydrogen cyanide. These would be converted by water to polypeptides which can be further hydrolyzed to α-amino acids. Black polymers and multimers with conjugated ladder structures derived from HCN could also be formed and might well be the source of the many nitrogen heterocycles, adenine included, observed after pyrolysis. The dark brown color arising from the impacts of comet P/Shoemaker-Levy 9 on Jupiter might therefore be mainly caused by the presence of HCN polymers, whether originally present, deposited by the impactor or synthesized directly from HCN. Spectroscopic detection of these predicted macromolecules and their hydrolytic and pyrolytic by-products would strengthen significantly the hypothesis that cyanide polymerization is a preferred pathway for prebiotic and extraterrestrial chemistry.

Ice Plasma Wave Measurements in the Ion Pick-Up Region of Comet Halley

2013 ◽  
pp. 857-860
Author(s):  
F.L. Scarf ◽  
F.V. Coroniti ◽  
C.F. Kennel ◽  
T.R. Sanderson ◽  
K-P Wenzel ◽  
...  
Keyword(s):  
Plasma Wave ◽  
Wave Measurements ◽  
Comet Halley

Observation of comet Halley by the ultraviolet imager of Suisei

Nature ◽  
1986 ◽  
Vol 321 (S6067) ◽  
pp. 297-299 ◽  
Author(s):  
E. Kaneda ◽  
O. Ashihara ◽  
M. Shimizu ◽  
M. Takagi ◽  
K. Hirao
Keyword(s):  
Comet Halley

The Comet Halley flyby I.R. sounder “I.K.S.”

1982 ◽  
Vol 2 (4) ◽  
pp. 113-122 ◽  
Author(s):  
M. Arduini ◽  
S. Cazes ◽  
J.F. Crifo ◽  
R. Gispert ◽  
D. Harduin ◽  
...  
Keyword(s):  
Comet Halley

Earth-based observations of Comet Halley dust and gas

1987 ◽  
Vol 323 (1572) ◽  
pp. 369-379
Keyword(s):  
Comet Halley

Very extensive ground-based observations of P/Halley have now been made, both to provide a standard cometary archive and to help interpret data from the Halley space probes. A number of new results are reported here, of which the most important is probably the major role played by sporadic activity of the nucleus in the development of the comet.

A model for intensity profiles of dust jets near the nucleus of comet Halley

Icarus ◽  
1988 ◽  
Vol 76 (1) ◽  
pp. 78-88 ◽  
Author(s):  
W.F. Huebner ◽  
D.C. Boice ◽  
H.J. Reitsema ◽  
W.A. Delamere ◽  
F.L. Whipple
Keyword(s):  
Comet Halley

Detection of a new “chemical” boundary at comet Halley

1986 ◽  
Vol 13 (7) ◽  
pp. 613-616 ◽  
Author(s):  
K. I. Gringauz ◽  
T. I. Gombosi ◽  
M. Tátrallyay ◽  
M. I. Verigin ◽  
A. P. Remizov ◽  
...  
Keyword(s):  
Comet Halley

First results of plasma and neutral gas measurements from near comet Halley

1985 ◽  
Vol 5 (12) ◽  
pp. 165-174 ◽  
Author(s):  
K.I. Gringauz ◽  
A.P. Remizov ◽  
M.I. Verigin ◽  
L.I. Denchikova ◽  
A.V. Dyachkov ◽  
...  
Keyword(s):  
Neutral Gas ◽  
First Results ◽  
Gas Measurements ◽  
Comet Halley

On the momentum balance along the Comet Halley — Sun line during the Giotto flyby

1993 ◽  
Vol 98 (A9) ◽  
pp. 15255 ◽  
Author(s):  
P. L. Israelevich ◽  
F. M. Neubauer ◽  
A. I. Ershkovich
Keyword(s):  
Momentum Balance ◽  
Comet Halley

A Surprise from the Predictable Comet Halley

Physics Today ◽  
1991 ◽  
Vol 44 (4) ◽  
pp. 20-20 ◽  
Author(s):  
Barbara Goss Levi
Keyword(s):  
Comet Halley
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