Results 91 to 100 of about 86,059 (172)
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
The Astronomical JournalComets, relics from the early solar system, consist of dust and ice. The ice sublimates as comets approach the Sun, ejecting dust from their nuclei seen as activity.
Yuna G. Kwon +6 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
Spectroscopic identification of water emission from a main-belt comet. [PDF]
Nature, 2023 Kelley MSP +6 more
europepmc +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
Early CN Outgassing and Production Rates of C/2024 E1 (Wierzchos) at 4 au
The Planetary Science JournalThe study of cometary activity at large heliocentric distances provides insights into the volatile release processes in the outer solar system. Early models predicted cometary activity was driven primarily by sublimation of water and therefore would ...
A. C. Mura +8 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
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
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
doaj +1 more source