Results 111 to 120 of about 902 (203)
, 2022 The practical distinctions between asteroids and comets, viewed as products of accretion on either side of the snow line, are less clear-cut than previously understood. In this chapter, we discuss the numerous solar system populations which have physical
Jewitt, David, Hsieh, Henry H.
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The Role of Ammonia in the Distribution of Volatiles in the Primordial Hydrosphere of Europa
The Planetary Science JournalThe presence of a hydrosphere on Europa raises questions about its habitability, and studies of its volatile inventory can provide insight into its formation process. Different scenarios suggest that Europa's volatiles could be derived from cometary ices
Alizée Amsler Moulanier +3 more
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Modeling the heterogeneous ice and gas coma of Comet 103P/Hartley 2
, 2013 The spectacular images of Comet 103P/Hartley 2 recorded by the Medium Resolution Instrument (MRI) and High Resolution Instrument (HRI) on board of the Extrasolar Planet Observation and Deep Impact Extended Investigation (EPOXI) spacecraft, as the Deep ...
Fougere, N. +3 more
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Unraveling the Water Sources in Comet 103P/Hartley 2 from Deep Impact Flyby Observations
The Planetary Science JournalThe Deep Impact eXtended Mission flyby of comet 103P/Hartley 2 offered a rare opportunity to study a hyperactive comet with high-cadence and high-resolution observations from a fixed vantage point.
L. M. Feaga, J. M. Sunshine
doaj +1 more source
Water Production of Interstellar Comet 3I/ATLAS from SOHO/SWAN Observations after Perihelion
The Astrophysical Journal LettersThe Solar Wind Anisotropies all-sky hydrogen Lyman-alpha camera on the Solar and Heliosphere Observatory observed the hydrogen coma of interstellar comet 3I/ATLAS, also called C/2025 N1 (ATLAS), beginning on 2025 November 6, 9 days after perihelion ...
M. R. Combi +6 more
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The Planetary Science JournalWe report a survey of molecular emission from cometary volatiles using the Atacama Large Millimeter/submillimeter Array toward comet C/2017 K2 (PanSTARRS) carried out on UT 2022 September 21, 22, and 23 at a heliocentric distance ( r _H ) of 2.1 au ...
Nathan X. Roth +10 more
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The Morphology of Volatile-rich Regoliths on Asteroids and Comets [PDF]
Recent space missions to asteroids and comets, have revealed divers morphologic features on multiple scales that can be linked to the presence of volatiles in the regolith of small bodies. The research presented in this thesis investigates the physics of these volatilerelated morphologies addressing (1) the relationship between surface morphologies and
openaire +1 more source
The Astronomical JournalHyperactive comet activity typically becomes evident beyond the frost line (∼3–4 au) where it becomes too cold for water-ice to sublimate. If carbon monoxide (CO) and carbon dioxide (CO _2 ) are the species that drive activity at sufficiently large ...
Dave G. Milewski +5 more
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The Astrophysical JournalPolyoxymethylenes (POMs) have long been hypothesized as key organics in comets, as their decomposition products could account for the possible extended cometary formaldehyde (H _2 CO) source.
Qi’ang Gong +7 more
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Halogens at Comet 67P/Churyumov-Gerasimenko observed by ROSINA-DFMS
, 2016 International audienceSince August 2014, the Rosetta spacecraft has been studying the coma of comet 67P/Churyumov-Gerasimenko. The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) sensor DFMS is a double focussing mass spectrometer with
Combi, Michael R. +20 more
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