Results 81 to 90 of about 902 (203)

Localized Convection in Sputnik Planitia, Pluto

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The cellular plains on Sputnik Planitia (SP) are thought to originate from convection in the nitrogen ice layer that fills the basin. Whereas the cells toward the center of SP's cellular plains are wider and interconnected—features explained by vigorous convection—the cells near the margins are smaller and less contiguous, with some appearing ...
C. Jain, V. S. Solomatov, W. B. McKinnon
wiley   +1 more source

Evidence for Abiotic Dimethyl Sulfide in Cometary Matter

The Astrophysical Journal
Technological progress related to astronomical observatories such as the recently launched James Webb Space Telescope (JWST) allows searching for signs of life beyond our solar system, namely, in the form of unambiguous biosignature gases in exoplanetary
Nora Hänni, Kathrin Altwegg, Michael Combi, Stephen A. Fuselier, Johan De Keyser, Niels F. W. Ligterink, Martin Rubin, Susanne F. Wampfler   +7 more
doaj   +1 more source

Second‐Scale Formation of Non‐Field‐Aligned Plasma Irregularities Observed From a High‐Altitude 43‐Cassiopeiids Fireball

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract High‐altitude optical meteors initiating above 150 km are exceedingly rare, with confirmed observations largely confined to the Leonids. Using the Meteor and ionospheric Irregularity Observation System, we recorded a bright 43‐Cassiopeiids fireball with heterogeneous material. It initiated luminously at an exceptional altitude of 157.8 ± $\pm $
Yi Li, Guozhu Li, Zhi Wu, Wenzhi Chen, Zhaoguo Huang, Lianhuan Hu, Xiukuan Zhao, Wenjie Sun, Haiyong Xie, Guofeng Dai, Jianfei Liu, Baiqi Ning, Shoumin Chang   +12 more
wiley   +1 more source

Multiple Outbursts of Halley-type Comet 12P/Pons–Brooks

The Astronomical Journal
We present optical observations of the Halley-type comet 12P/Pons–Brooks (12P) on its approach to perihelion. The comet was active even in the first observations at ∼8 au.
David Jewitt, Jane Luu
doaj   +1 more source

Impact of Co‐Solvents and Additives on the Indoor Stability of Green Solvent‐Processed Organic Solar Cells

Solar RRL, Volume 10, Issue 10, 27 May 2026.
This study investigates the stability of TPD‐3F:FCC‐Cl blends under indoor conditions with various cosolvents and additives. The results reveal significant burn‐in degradation due to morphological instability under mild testing conditions. However, the DBDMF solid additive demonstrates improved stability, attributed to its lower miscibility and more ...
Ignacio Ballesteros García, Anass Khodr, Takeshi Watanabe, Hidehiro Sekimoto, Hasan Alkhatib, Donia Fredj, Sadok Ben Dkhil, Carmen M. Ruiz Herrero, Jean‐Jacques Simon, Simon Desbief, Olivier Margeat, Christine Videlot‐Ackermann, Judikaël Le Rouzo, Jörg Ackermann   +13 more
wiley   +1 more source

Volatile Abundances, Extended Coma Sources, and Nucleus Ice Associations in Comet C/2014 Q2 (Lovejoy)

, 2022
International audienceHigh-resolution infrared spectra of comet C/2014 Q2 Lovejoy were acquired with NIRSPEC at the W. M. Keck Observatory on two post-perihelion dates (UT 2015 February 2 and 3). H2O was measured simultaneously with CO, CH3OH, H2CO, CH4,
Khan, Younas, Vervack, Ronald J., Bonev, Boncho P., Cochran, Anita L., Roth, Nathan X., Saki, Mohammad, Weaver, Harold A., Crovisier, Jacques, Disanti, Michael A., Dello Russo, Neil, Gibb, Erika L., Kobayashi, Hitomi, Biver, Nicolas, Kawakita, Hideyo, D., Bockelée-Morvan, Harris, Walter M., Mckay, Adam J.   +16 more
core   +1 more source

Contemporaneous Optical and Near-infrared Observations of the Interstellar Comet 3I/ATLAS Pre- and Postperihelion

The Astronomical Journal
Interstellar objects provide a unique view into the formation of other star systems. Here we present spectroscopic observations of the recently discovered interstellar object 3I/ATLAS between a heliocentric distance of 3.7–1.8 au on either side of its ...
Kyle Medler, Willem B. Hoogendam, Christopher Ashall, Bin Yang, James J. Wray, Benjamin J. Shappee, Karen J. Meech, Michael A. Tucker, Katie Auchettl, Dhvanil D. Desai, Jason T. Hinkle, Andrew M. Hoffman, Mark E. Huber, David O. Jones, Ruining Zhao   +14 more
doaj   +1 more source

Far-Ultraviolet Observations of Condensed Volatiles at the Lunar South Pole and the Pre-Perihelion Coma of Comet C/2013 A1 (Siding Spring) by Lro-Lamp

, 2021
This item is available only to currently enrolled UTSA students, faculty or staff. To download, navigate to Log In in the top right-hand corner of this screen, then select Log in with my UTSA ID.Ultraviolet spectroscopy is a powerful tool in ...
Magana, Lizeth Ofelia
core  

Down But Not Out: The Case of Long-period Comet C/2021 O3 (Panstarrs)

The Astronomical Journal
We combine ground- and space-based observations of long-period comet C/2021 O3 (Panstarrs; perihelion distance 0.287 au) in order to investigate its reported near-perihelion destruction.
David Jewitt, Jing Li, Michael Jaeger, Yoonyoung Kim   +3 more
doaj   +1 more source

The Primary Volatile Composition of Comet C/2012 K1 (PanSTARRS)

, 2016
On 2014 May 22 and 24 we characterized the volatile composition of the dynamically new Oort cloud comet C/2012 K1 (PanSTARRS) using the long-slit, high resolution (λ/Δλ ≈ 25,000) infrared echelle spectrograph (NIRSPEC) at the 10 m Keck 2 telescope on ...
Roth, Nathaniel Xavier
core