Results 61 to 70 of about 28,676 (218)

Photoionization modeling of the Galactic planetary nebulae Abell 39 and NGC 7027

, 2011
We estimate distances to the spherical planetary nebula Abell 39 and the bipolar planetary nebula NGC 7027 by interpolating from a wide grid of photoionization models using the 3-D code, MOCASSIN.
Ashkbiz Danehkar, Bernard Salas, David J. Frew, Orsola De Marco, Quentin A. Parker, Rauch, Zhang   +6 more
core   +1 more source

Modeling enstatite chondrites: Reduced rocks with a pinch of oxidized material (affected by varying H2O(g)) derived from planetesimals shocked during the epoch of giant–planet migration

Meteoritics &Planetary Science, Volume 61, Issue 1, Page 122-139, January 2026.
Abstract The O‐, N‐, Mo‐, Ru‐, Os‐, Cr‐, Ti‐, Ni‐, Fe‐, Nd‐, Ca‐, Zn‐, Sr‐, and Mg‐isotopic compositions of enstatite chondrites are essentially identical to those of the Earth and Moon. These correspondences suggest enstatite chondrites formed at ≈1 AU as the only known chondrite groups that accreted in the vicinity of a major planet. Bulk Earth has a
Alan E. Rubin
wiley   +1 more source

The magnetic field of the proto-planetary nebula candidate IRAS 19296+2227

, 2008
Context: Magnetic fields are thought to be one of the possible mechanisms responsible for shaping the generally spherical outflow of evolved stars into often aspherical planetary nebulae.
Bains, Bains, Balick, Bujarrabal, Chevalier, Cotton, Deguchi, Engels, Etoka, Falceta-Gonçalves, H. J. van Langevelde, Herpin, Imai, Kemball, Kemball, Kwok, Marvel, Miranda, Nedoluha, Soker, Suárez, Vidotto, Vlemmings, Vlemmings, Vlemmings, Vlemmings, Vlemmings, Vlemmings, W. H. T. Vlemmings   +28 more
core   +1 more source

Occurrence and characterization of nanosulfide‐rich regions on asteroid Ryugu: Insights from mackinawite and pyrrhotite

Meteoritics &Planetary Science, Volume 61, Issue 1, Page 168-181, January 2026.
Abstract Samples returned from asteroid Ryugu by the Hayabusa2 mission are dominated by fine‐grained matrix material made of phyllosilicates and nanosulfides. Here, we report the mineralogical, textural, and chemical characteristics of nanosulfide‐rich regions identified in Ryugu particles.
Roberto Conconi, Hugues Leroux, Maya Marinova, Sylvain Laforet, Damien Jacob, Léna Jossé, Alice Aléon‐Toppani, Zélia Dionnet, Rosario Brunetto, Corentin Le Guillou   +9 more
wiley   +1 more source

Confirmation of SBS 1150+599A As An Extremely Metal-Poor Planetary Nebula

, 2002
SBS 1150+599A is a blue stellar object at high galactic latitude discovered in the Second Byurakan Survey. New high-resolution images of SBS 1150+599A are presented, demonstrating that it is very likely to be an old planetary nebula in the galactic halo,
Alberto Noriega-Crespo, Balayan S. K., Bicay M. D., Blocker T., Charles F. Claver, Garnavich P. M., George H. Jacoby, Grevesse N., Grevesse N., Henry R. B. C., Howard E. Bond, Howard J. W., Jason Quinn, John J. Feldmeier, Peter M. Garnavich, Shklovsky I., Stetson P. B., Torres-Peimbert S., Voges W., Weidemann V.   +19 more
core   +1 more source

Lawnmower Poetry and the Poetry of Lawnmowers

Critical Quarterly, EarlyView.
Francesca Gardner
wiley   +1 more source

Physiology of nitrogen: A life or death matter

Experimental Physiology, Volume 111, Issue 1, Page 270-282, 1 January 2026.
Abstract With each breath, four out of every five molecules we inspire are nitrogen (N2), since this gas constitutes ∼80% of the atmospheric air that surrounds us. Despite its abundance and unlike molecular oxygen, N2 has traditionally held less appeal among physiologists given its lack of reactivity and corresponding inability to support combustion or
Damian M. Bailey, Vaughan G. Macefield, David C. Poole   +2 more
wiley   +1 more source

Protracted Timescales for Nebular Processing of First-formed Solids in the Solar System

The Astrophysical Journal, 2023
The calcium–aluminum-rich inclusions (CAIs) from chondritic meteorites are the first solids formed in the solar system. Rim formation around CAIs marks a time period in early solar system history when CAIs existed as free-floating objects and had not yet
Prajkta Mane, Maitrayee Bose, Meenakshi Wadhwa, Céline Defouilloy   +3 more
doaj   +1 more source

Confronting expansion distances of planetary nebulae with Gaia DR2 measurements

, 2019
Individual distances to planetary nebulae are of the utmost relevance for our understanding of post-asymptotic giant-branch evolution because they allow a precise determination of stellar and nebular properties.
Schönberner, D., Steffen, M.
core   +1 more source

Natural Hydrogen: A Mini‐Review Unveiling Its Potential as a Key to Sustainable Future for Energy

EcoEnergy, Volume 3, Issue 4, December 2025.
This mini‐review summarizes natural hydrogen's formation mechanisms, exploration progress, and potential to drive global energy transition toward sustainability. ABSTRACT As the global energy shortage challenge and transition continues, greater attention is being drawn to natural hydrogen, a clean and high‐potential energy source.
Yuanming Gao, Silin Liu, Rong Chen, Zongyi Li, Xuezhen Wu, Wen Ma, Yuzhuo Luo, Yanhe Wang, Xi Ding, Xiaoxin Li, Henrietta W. Langmi, Nicholas M. Musyoka, Lei Jiang, Rodolfo Christiansen, Guo‐Ming Weng   +14 more
wiley   +1 more source