Results 101 to 110 of about 681,612 (216)
The Planetary Science JournalThe study of cometary composition is important for understanding our solar system's early evolutionary processes. Carbon dioxide (CO _2 ) is a common hypervolatile in comets that can drive activity but is more difficult to study than other hypervolatiles
Mikayla R. Huffman +2 more
doaj +1 more source
JWST Detection of a Carbon-dioxide-dominated Gas Coma Surrounding Interstellar Object 3I/ATLAS
The Astrophysical Journal Letters3I/ATLAS is the third confirmed interstellar object to visit our solar system and only the second to display a clear coma. Infrared spectroscopy with the James Webb Space Telescope (JWST) provides the opportunity to measure its coma composition and ...
Martin A. Cordiner +12 more
doaj +1 more source
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
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
doaj +1 more source
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
Results from the EPOXI and StardustNExT Missions – A Changing View of Comet Volatiles and Activity
Proceedings of the International Astronomical Union, 2012 K. Meech, M. A’Hearn, J. Veverka
semanticscholar +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
doaj +1 more source
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
doaj +1 more source
Brightness Behavior of Distant Oort Cloud Comets
The Planetary Science JournalDynamically new comets provide important insights into the conditions of the presolar nebula and its evolution, as they are believed to have experienced minimal solar heating before their discovery.
Carrie E. Holt +17 more
doaj +1 more source
On the attempts to measure water (and other volatiles) directly at the surface of a comet
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2017 Ian Wright +4 more
semanticscholar +1 more source