As comet 9P/Tempel 1 approaches the Sun in 2004–2005, a temporary atmosphere, or "coma," will form, composed of molecules and dust expelled from the nucleus as its component icy volatiles sublimate. Driven mainly by water ice sublimation at surface temperatures T > 200 K, this coma is a...
(1991), Negative ions in the coma of comet Halley, Nature, 349, 393 - 396.Chaizy, P. et al. Negative ions in the coma of comet Halley. Nature 349, 393-396 (1991).P .Chaizy, H. Reme , J.A. Sauvaud, C. d'Uston , R.P.Lin , D.E. Larson, D.L. Mitchell, K.A. ...
1.AstronomyThe nebulous luminescent cloud surrounding the nucleus of a comet and composed of material evaporated from the nucleus when the comet is near the perihelion of its orbit. The nucleus and coma together form the head of a comet. ...
Coma DefinitionnounA state of deep, often prolonged unconsciousness, usually the result of injury, disease, or poison, in which an individual is incapable of sensing or responding to external stimuli and internal needs. from The American Heritage Dictionary of the English Language, 4th Edition...
Water ortho-to-para ratio in the coma of comet 67P/Churyumov-Gerasimenko Abundance ratios of the nuclear-spin isomers of H _2 2 _2 O and NH _3 3 _3 have been measured in about two dozen comets, with a mean value corresponding t... YC Cheng,D Bockelée-Morvan,M Roos-Serote,.....
Mendis, D.A., Krueger, F.R., Richter, A.K., Lin, R.P., Mitchell, D.L., Anderson, K.A., Carlson, C.W., Rème, H., Sauvaud, J.A., d’uston, C.: 1989,’ Probable Detection of Organic Dust-born Aromatic C 3 H + 3 Ions in the Coma of Comet Halley’, Nature 337, ...
Comet Definition noun Acelestialbody,observedonly in that part of itsorbitthat isrelativelycloseto thesun,havingaheadconsistingof asolidnucleussurroundedby anebulouscomaup to2.4millionkilometers(1.5millionmiles) indiameterand anelongatedcurvedvaportailarisingfrom thecomawhensufficientlycloseto thesun.Cometsare...
Here we report in situ measurement of O2 in the coma of comet 67P/Churyumov-Gerasimenko, with local abundances ranging from one per cent to ten per cent relative to H2O and with a mean value of 3.80 ± 0.85 per cent. Our observations indicate that the O2/H2O ratio is isotropic in ...
机译:彗星67P / Churyumov-Gerasimenko昏迷中的rypto同位素和稀有气体丰度 7. Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun [O] . A. Rotundi, H. Sierks, V. Della Corte, 2015 机译:Comet 67p / Churyumov-Gerasimenko入站到阳光下的灰尘测量 获取...
Observations using a fast CCD and custom built Video Data Acquisition System at the Nasmyth focus of the 2.3 meter telescope at Siding Spring Observatory, Australia produced digitized spectra and images of comet Halley. On March 25 (UT), an overall brightening and anti-sunward jet was recorded ...