Results 81 to 90 of about 172,889 (233)
Evolution of Terrestrial Planetary Bodies and Implications for Habitability
Reviews of Geophysics, Volume 63, Issue 4, December 2025.Abstract The terrestrial planetary bodies of our solar system—Mercury, Venus, Earth, and Mars—share a common origin through nebular accretion and early magma ocean differentiation, yet they diverged significantly in geological evolution, tectonic regimes, and habitability.
Peter A. Cawood +4 more
wiley +1 more source
Neutron-Capture Element Abundances in Planetary Nebulae
Galaxies, 2020 Nebular spectroscopy is a valuable tool for assessing the production of heavy elements by slow neutron(n)-capture nucleosynthesis (the s-process). Several transitions of n-capture elements have been identified in planetary nebulae (PNe) in the last few ...
N. C. Sterling
doaj +1 more source
Weak magnetic fields in central stars of planetary nebulae [PDF]
, 2014 It is not yet clear whether magnetic fields play an essential role in shaping planetary nebulae (PNe), or whether stellar rotation alone and/or a close binary companion can account for the variety of the observed nebular morphologies.
M. Steffen +11 more
semanticscholar +1 more source
Geostandards and Geoanalytical Research, Volume 49, Issue 4, Page 737-750, December 2025.Key Points PEEK tubing has been observed to adsorb Pd and Pt ions, resulting in significantly reduced recoveries of Pd and Pt elements. HPA‐S provides a more effective dissolution for meteorite samples than Carius tube digestion, resulting in higher mass fractions for PGE.
Yuling Zeng +2 more
wiley +1 more source
Irradiation Investigation: Exploring the Molecular Gas in NGC 7293
Galaxies, 2020 Background: Many planetary nebulae retain significant quantities of molecular gas and dust despite their signature hostile radiation environments and energetic shocks.
Jesse Bublitz +7 more
doaj +1 more source
A search for magnetic fields on central stars in planetary nebulae [PDF]
, 2014 Departamento de Astrofisica, Universidad de La Laguna, E-38205 La Laguna, Tenerife, SpainReceived To be inserted later, accepted To be inserted laterABSTRACTContext.One of the possible mechanisms responsible for the panoply of shapes in planetary nebulae
F. Leone +4 more
semanticscholar +1 more source
New Arabic Records From Cairo on Supernovae 1181 and 1006
Astronomische Nachrichten, Volume 346, Issue 9, November 2025.ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer +3 more
wiley +1 more source
Spectroscopy of Planetary Nebulae with Herschel: A Beginners Guide
Galaxies, 2018 A brief overview of the Herschel Space Telescope PACS and SPIRE spectrographs is given, pointing out aspects of working with the data products that should be considered by anyone using them.
Katrina Exter
doaj +1 more source
On the distances of planetary nebulae [PDF]
, 2014 Reconsidering calibration of statistical distance scales for planetary nebulae leads naturally to examining precision and especially the systematic errors of other methods.
H. Smith
semanticscholar +1 more source
Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.Abstract We present high‐precision Ni stable isotope data for mesosiderites, eucrites, and diogenites to investigate the accretion and differentiation of asteroid 4 Vesta. Ni isotope variations in eucrites and diogenites are dominated by kinetic diffusion and chondritic contamination, rendering them unsuitable for reconstructing Vesta's primitive Ni ...
Ke Zhu, Makiko K. Haba, Qi Chen, Lu Chen
wiley +1 more source