Results 31 to 40 of about 91,815 (175)

Predictions of the solar wind interaction with Comet Grigg-Skjellerup [PDF]

, 1992
The planned encounter of the Giotto spacecraft with comet Grigg-Skjellerup on 10th July 1992 promises to extend our knowledge of the solar wind interaction with comets substantially.
Johnstone, AD, Huddleston, DE, Coates, AJ   +2 more
core  

Gelato: A Mission Concept for Comet Surface Sample Return

The Planetary Science Journal
Understanding the role of comets in solar system formation and evolution has continued to be a driving question in planetary science. It is believed that comets host a record of presolar history and early planet formation and likely delivered volatiles ...
Mallory J. Kinczyk, Gabriel E. Buffo, L. Miché Aaron-Hennig, Spencer Boone, Eric Frizzell, Abigail Flom, Chinmayee Govinda Raj, Camilla Harris, Ali Hyder, Benjamin Idini, Vidu Jayanetti, Spiridon Kasapis, Brennan McCann, Emily Millman, Alvin Ngo, Mary Ringwood, Laura E. Rodriguez, Amanda Rudolph, Karl Mitchell, Alfred Nash, William Smythe   +20 more
doaj   +1 more source

A Microkrystite from the Australasian Tektite/Microtektite Strewn Field

Meteoritics &Planetary Science, EarlyView.
Abstract Microkrystites are glassy impact spherules. They contain primary crystallites carrying information on the physical and chemical conditions prevailing during vaporization, melting, and ejection in large impact cratering events. We report on the geochemistry and mineralogy down to nanometer scale of the first microkrystite (ODP1144A,14) from the
Matteo Del Rio, Luigi Folco, Matteo Masotta, Ana Černok, Enrico Mugnaioli   +4 more
wiley   +1 more source

Surprisingly Enriched CO and CH4 in Halley-type Comet 13P/Olbers: Clues to Its Interstellar Heritage

The Planetary Science Journal
The native ice composition of Halley-type Comet 13P/Olbers (hereafter 13P) was measured post-perihelion, on UT 2024 August 16 using iSHELL, the 1–5 μ m cross-dispersed, high-resolution facility spectrograph at the NASA InfraRed Telescope Facility.
Michael A. DiSanti, Mohammad Saki, Erika L. Gibb, Boncho P. Bonev, Neil Dello Russo, Ronald J. Vervack Jr, Karen Willacy, Younas Khan, Sara Faggi, Nathan X. Roth, Geronimo L. Villanueva, Hideyo Kawakita   +11 more
doaj   +1 more source

Recurring Activity Discovered on Quasi-Hilda 2009 DQ118

The Astrophysical Journal Letters, 2023
We have discovered two epochs of activity on quasi-Hilda 2009 DQ _118 . Small bodies that display comet-like activity, such as active asteroids and active quasi-Hildas, are important for understanding the distribution of water and other volatiles ...
William J. Oldroyd, Colin Orion Chandler, Chadwick A. Trujillo, Scott S. Sheppard, Henry H. Hsieh, Jay K. Kueny, William A. Burris, Jarod A. DeSpain, Kennedy A. Farrell, Michele T. Mazzucato, Milton K. D. Bosch, Tiffany Shaw-Diaz, Virgilio Gonano   +12 more
doaj   +1 more source

Water and hydroxyl on asteroid Bennu: Reconciling remote observations with OSIRIS‐REx sample analysis

Meteoritics &Planetary Science, EarlyView.
Abstract This study investigates the spatial distribution and spectral characteristics of the broad hydration feature near 3 μm across the surface of asteroid (101955) Bennu using OVIRS (OSIRIS‐REx Visible and InfraRed Spectrometer) data. We analyzed multiple global OVIRS data sets obtained at different times throughout the Bennu day, revealing ...
Hannah H. Kaplan, Amy A. Simon, Victoria E. Hamilton, Joshua P. Emery, Dennis Reuter, Andy J. López‐Oquendo   +5 more
wiley   +1 more source

VUV and mid‐UV photoabsorption cross sections of thin films of glycine and alanine: Application to their photochemistry in the solar system

Photochemistry and Photobiology, EarlyView.
Thin solid films of pure glycine or alanine (thicknesses ranging from 10 to 700 nm) were prepared on MgF2 windows using a vacuum sublimation/recondensation method. VUV‐UV spectroscopy of these films enabled us to characterize new absorption cross sections for glycine and alanine for VUV‐UV radiations between 120 and 300 nm.
Juliette Pastore, Hervé Cottin, Kafila Saïagh, Jodie Belilla, Fabien Stalport, Nicolas Fray, Nathalie Carrasco   +6 more
wiley   +1 more source

Parent Volatile Outgassing Associations in Cometary Nuclei: Synthesizing Rosetta Measurements and Ground-based Observations

The Planetary Science Journal
Comets, as remnants of the solar system’s formation, vary in volatile-refractory content. In situ comet studies, such as the Rosetta mission to 67P/Churyumov–Gerasimenko, provide detailed volatile composition insights, while ground-based studies offer ...
Mohammad Saki, Dennis Bodewits, Boncho P. Bonev, Neil Dello Russo, Adrienn Luspay-Kuti, John W. Noonan, Michael. R. Combi, Yinsi Shou   +7 more
doaj   +1 more source

The Effects of Early Collisional Evolution on Amorphous Water Ice Bodies

The Planetary Science Journal, 2023
Conditions in the outer protoplanetary disk during solar system formation were thought to be favorable for the formation of amorphous water ice (AWI), a glassy phase of water ice.
Jordan K. Steckloff, Gal Sarid, Brandon C. Johnson   +2 more
doaj   +1 more source

The Rich Chemistry of Ionized Methanol With Sulfur Dioxide: Pathways to Prebiotic and Elusive Species in Earth's Atmosphere and Space

Chemistry – A European Journal, Volume 32, Issue 39, 22 October 2026.
The reaction between the methanol radical cation and sulfur dioxide is remarkably fast and forms several ionic and neutral products (HOSOH+, CH2OSO+, CH2OH+, CH2O, H2O, HSO2). The chemistry goes beyond simple proton or hydrogen transfer, revealing a close interaction between the two species, relevant to atmospheric and astrochemical environments where ...
Mauro Satta, Daniele Catone, Mattea Carmen Castrovilli, Antonella Cartoni   +3 more
wiley   +1 more source