Results 91 to 100 of about 91,815 (175)

The CAESAR New Frontiers Comet Sample Return Mission [PDF]

, 2018
The Comet Astrobiology Exploration Sample Return (CAESAR) mission is one of two finalists selected by NASA for Phase A study in the New Frontiers program.
Messenger, Scott R.
core  

Inferring the CO2 Abundance in Comet 45P/Honda-Mrkos-Pajdušáková from [O i] Observations: Implications for the Source of Icy Grains in Cometary Comae

The Planetary Science Journal
The 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, Adam J. McKay, Anita L. Cochran   +2 more
doaj   +1 more source

The Pre-perihelion Evolution of the Activity of Comet C/2017 K2 (Pan-STARRS) during the Water Ice-line Crossover

The Astronomical Journal
Comets, 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, Stefano Bagnulo, Johannes Markkanen, Ludmilla Kolokolova, Jessica Agarwal, Manuela Lippi, Zuri Gray   +6 more
doaj   +1 more source

JWST Detection of a Carbon-dioxide-dominated Gas Coma Surrounding Interstellar Object 3I/ATLAS

The Astrophysical Journal Letters
3I/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, Nathan X. Roth, Michael S. P. Kelley, Dennis Bodewits, Steven B. Charnley, Maria N. Drozdovskaya, Davide Farnocchia, Marco Micheli, Stefanie N. Milam, Cyrielle Opitom, Megan E. Schwamb, Cristina A. Thomas, Stefano Bagnulo   +12 more
doaj   +1 more source

Spectroscopic identification of water emission from a main-belt comet. [PDF]

Nature, 2023
Kelley MSP, Hsieh HH, Bodewits D, Saki M, Villanueva GL, Milam SN, Hammel HB.   +6 more
europepmc   +1 more source

Observational views of Donati's comet, 1858, 3 [picture] /

Title devised by cataloguer based on inscription.; Part of the collection: Donati's comet, 1858; Inscriptions: Fig. VII-IX--On image; "Ludwig Becker" del & lith--Printed below image lower left; "Ladd & Carr imp."--Printed below image lower right; "Donati'
Becker, Ludwig, 1808?-1861.
core  

Water Production of Interstellar Comet 3I/ATLAS from SOHO/SWAN Observations after Perihelion

The Astrophysical Journal Letters
The 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, T. Mäkinen, J. L. Bertaux, E. Quémerais, S. Ferron, R. Lallement, W. Schmidt   +6 more
doaj   +1 more source

The CAESAR New Frontiers Mission: Comet Surface Sample Acquisition and Preservation [PDF]

, 2018
NASA recently selected the Comet Astrobiology Exploration Sample Return (CAESAR) mission for Phase A study in the New Frontiers Program. This mission will acquire and return to Earth for laboratory analysis at least 80 g of surface material from the ...
Dworkin, J. P., Wegel, D. C., Hayes, A. G., Gorevan, S., Houghton, M. B., Spring, J., Peabody, H. L., Lauretta, D. S., Chu, P. C., Gerakines, P. A., Nakamura-Messenger, K., Furukawa, Y., Messenger, S., Yamada, K., Zacny, K. A., Clemett, S., Aslam, S., Quilligan, G., Kolasinski, J., Squyres, S. W., Parker, J. E., Gorius, N., Glavin, D. P.   +22 more
core  

Early CN Outgassing and Production Rates of C/2024 E1 (Wierzchos) at 4 au

The Planetary Science Journal
The 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, F. La Forgia, M. Lazzarin, G. Cremonese, P. Cambianica, G. Munaretto, A. Farina, F. Cusano, E. Marini   +8 more
doaj   +1 more source

Unraveling the Water Sources in Comet 103P/Hartley 2 from Deep Impact Flyby Observations

The Planetary Science Journal
The 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