Results 61 to 70 of about 91,815 (175)

The CAESAR New Frontiers Mission: 1. Expected Nature of the Returned Comet Sample [PDF]

, 2019
Comets are time capsules from the birth of our Solar System that record pre-solar history, the initial stages of planet formation, and the sources of prebiotic organics and volatiles for the origin of life.
Violet, M., Nguyen, A., Canham, J. S., Oberg, D., Herd, C. D. K., Houghton, M. B., Chu, P. C., Furukawa, Y., Nakamura-Messenger, K., Gerakines, P. A., Pace, L. F., Blake, G., Takigawa, A., Kimura, Y., Makowski, J. M., Mumma, M., Zacny, K., Bermudez, L., Dworkin, J. P., Milam, S., Zega, T. J., Lorentson, C. C., Lauretta, D. S., Spring, J. W., Messenger, S., Glavin, D. P., Clemett, S., Nakamura, T., Squyres, S. W.   +28 more
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The Rosetta mission orbiter science overview: the comet phase

, 2017
The international Rosetta mission was launched in 2004 and consists of the orbiter spacecraft Rosetta and the lander Philae. The aim of the mission is to map the comet 67P/Churyumov–Gerasimenko by remote sensing, and to examine its ...
M. G. G. T. Taylor, B. J. Buratti, N. Altobelli, M. Choukroun   +3 more
core   +1 more source

Evidence for Abiotic Dimethyl Sulfide in Cometary Matter

The Astrophysical Journal
Technological progress related to astronomical observatories such as the recently launched James Webb Space Telescope (JWST) allows searching for signs of life beyond our solar system, namely, in the form of unambiguous biosignature gases in exoplanetary
Nora Hänni, Kathrin Altwegg, Michael Combi, Stephen A. Fuselier, Johan De Keyser, Niels F. W. Ligterink, Martin Rubin, Susanne F. Wampfler   +7 more
doaj   +1 more source

Development of Primary Volatile Production in COMET C/20O9 Pl (GARRADD) During its 2011-2O12 Apparition [PDF]

, 2012
We quantified primary volatiles in comet C/2009 Pl (Garradd) through pre- and post-perihelion observations acquired during its apparition in 2011-12 [1,2,3]. Detected volatiles include H2O, CO, CH4, C2H2, C2H6, HCN, NH3, H2CO, and CH3OH.
Lippi, M., Paganini, L., Villanueva, G. L., Mumma, M. J., Boehnhardt, H., Blake, G. A., DiSanti, M. A., Meech, K. J., Keane, J. V., Bonev, B. P.   +9 more
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The Highly Unusual Behavior and Chemical Composition of Interstellar Comet 2I/Borisov

The Planetary Science Journal
We report on imaging, spectroscopy, and narrowband photometry of interstellar comet 2I/Borisov obtained at Lowell Observatory from 2019 September 13 to December 16.
Allison N. Bair, David G. Schleicher, Theodore Kareta, Matthew M. Knight, Michael S. P. Kelley   +4 more
doaj   +1 more source

Covertly Active Comet (139359) 2001 ME1

The Planetary Science Journal
On 2018 November 18, coronagraphs onboard the Solar and Heliospheric Observatory (SOHO) captured an unrecognized comet crossing its fields of view. We identified this comet to be the minor planet (139359) 2001 ME _1 , whose previously unnoticed dust ...
Qicheng Zhang, Quanzhi Ye, Karl Battams, Matthew M. Knight, Worachate Boonplod, Rainer Kracht   +5 more
doaj   +1 more source

Olfaction in the Colorado beetle at the onset of host plant selection [PDF]

, 1979
Long-range olfactory orientation of the adult Colorado beetle was studied in a low- speed wind tunnel. The odour of fully grown potato plants elicits an upwind locomotory response in Colorado beetles (odour-conditioned positive anemotaxis), and increases
Visser, J.H.
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Comparative Evaluation of Genotoxicity of Captan in Amphibian Larvae (Xenopus laevis and Pleurodeles waltl) Using the Comet Assay and the Micronucleus Test [PDF]

, 2006
Captan (N-trichloromethylthio-4-cyclohexene-1,2-dicarboximide) is a fungicide used to inhibit the growth of many types of fungi on plants used as foodstuffs.
Gauthier, Laury, Devaux, Alain, Gauthier, L., Mouchet, F., Ferrier, V., Mouchet, Florence, Ferrier, Vincent, Mailhes, Corinne, Devaux, A.   +8 more
core   +1 more source

Contemporaneous Optical and Near-infrared Observations of the Interstellar Comet 3I/ATLAS Pre- and Postperihelion

The Astronomical Journal
Interstellar objects provide a unique view into the formation of other star systems. Here we present spectroscopic observations of the recently discovered interstellar object 3I/ATLAS between a heliocentric distance of 3.7–1.8 au on either side of its ...
Kyle Medler, Willem B. Hoogendam, Christopher Ashall, Bin Yang, James J. Wray, Benjamin J. Shappee, Karen J. Meech, Michael A. Tucker, Katie Auchettl, Dhvanil D. Desai, Jason T. Hinkle, Andrew M. Hoffman, Mark E. Huber, David O. Jones, Ruining Zhao   +14 more
doaj   +1 more source

The Primary Volatile Composition of Comet C/2012 K1 (PanSTARRS) [PDF]

, 2016
On 2014 May 22 and 24 we characterized the volatile composition of the dynamically new Oort cloud comet C/2012 K1 (PanSTARRS) using the long-slit, high resolution (λ/Δλ ≈ 25,000) infrared echelle spectrograph (NIRSPEC) at the 10 m Keck 2 telescope on ...
Roth, Nathaniel Xavier
core   +1 more source