Results 91 to 100 of about 3,185 (219)

Fractal Dimensions of Venusian Lava Flows: New Findings for Atla Regio and Review of Previous Analyses

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The fractal dimensions of lava flow margins on Earth often correlate with their flow morphologies and have been used to tentatively identify flow morphology on other rocky planets where fine‐scale observations are limited. Previous studies of lava flow margins on Venus have reported fractal dimensions (D) mostly within the range between 1.05 ...
E. M. Recchuiti, V. Haag, D. R. Bohnenstiehl, A. Soldati   +3 more
wiley   +1 more source

Amapari Marker Band Metal‐Enrichments: Potential Mechanisms and Implications for Surface and Subsurface Water and Weathering in Gale Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract NASA's Curiosity rover is exploring a 5 km tall sedimentary mound that is hypothesized to record the transition from a warm and wet (phyllosilicate‐rich) to a cold and drier (sulfate‐rich) Mars. Evidence of magnesium sulfate‐bearing rock has shown that Curiosity has crossed through this phyllosilicate‐sulfate transition.
P. J. Gasda, E. S. Kite, L. M. Thompson, C. Mondro, W. E. Dietrich, C. M. Weitz, B. Tutolo, W. H. Farrand, E. Hausrath, A. Cowart, N. L. Lanza, K. W. Lewis, S. Gupta, A. Roberts, W. Goetz, H. E. Newsom, L. Crossey, J. Lightholder, C. Hardgrove, J. Schieber, S. P. Schwenzer, S. J. VanBommel, S. Schröder, C. D. O'Connell‐Cooper, D. Das, D. Rubin, W. Rapin, T. F. Bristow, E. Rampe, P. D. Archer Jr, C. Seeger, G. Caravaca, J. R. Johnson, S. Le Mouélic, J. A. Grant, J. Davis, J. Lasue, A. Yingst, A. B. Bryk, M. P. Lamb, W. W. Fischer, C. House, E. Dehouck, A. Essunfeld, R. Milliken, R. Sheppard, M. Minitti, D. Ming, S. Simpson, J. Frydenvang, R. M. E. Williams, R. Arvidson, R. Gellert, O. Gasnault, S. M. Clegg, D. Delapp, A. R. Vasavada, A. Fraeman   +57 more
wiley   +1 more source

Redshift Distributions of Fast Radio Bursts Inferred Using Clustering in Dispersion Measure Space

The Astrophysical Journal
Fast radio bursts (FRBs), millisecond-duration radio transient events, possess the potential to serve as excellent cosmological probes. The FRB redshift distribution contains information about the FRB sources, providing key constraints on the types of ...
Hui Peng, Yu Yu
doaj   +1 more source

Were There Tides on Ancient Mars?

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Tides are a key component in the Earth system as they help regulate climate and sustain life. Mars very likely had a surface ocean around 4–3 billion years ago. The NASA Curiosity Rover and the CNSA Zhurong Rover were sent to Gale Crater and the Vastitas Borealis Formation (VBF) on Mars to explore the surface and search for evidence of the ...
M. Jolley, M. Gugliotta, J. A. M. Green
wiley   +1 more source

A Panspermia Origin for Venus Cloud Life

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Decades of study have hinted at the astrobiological potential of Venus's cloud layers. This potential is often cast as stemming from the idea that the Venusian surface was clement in the past. As the climate changed, life then remained in, or perhaps evolved and migrated to, the last habitable niche: the altitudes above ∼50 km with Earth‐like ...
E. Guinan, T. J. Austin, J. G. O’Rourke, N. G. Izenberg, E. A. Silber, E. Trembath‐Reichert   +5 more
wiley   +1 more source

Strong Variability of the Modeled Venus NO Nightglow

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The ultraviolet nightglow of nitric oxide (NO) on Venus offers a unique window into the dynamics and chemistry of its upper atmosphere. We present three‐dimensional simulations of Venus' NO nightglow using a ground‐to‐thermosphere model, revealing a strong, short‐timescale variability consistent with observations.
N. Streel, F. Lefèvre, A. Martinez, A. Määttänen, A. Stolzenbach, S. Lebonnois, J. C. Gérard, L. Soret   +7 more
wiley   +1 more source

Insights into the Galactic Bulge Chemodynamical Properties from Gaia Data Release 3

The Astrophysical Journal
We explore the chemodynamical properties of the Galaxy in the azimuthal velocity V _ϕ and metallicity [Fe/H] space using red giant stars from Gaia Data Release 3.
Xiaojie Liao, Zhao-Yu Li, Iulia Simion, Juntai Shen, Robert Grand, Francesca Fragkoudi, Federico Marinacci   +6 more
doaj   +1 more source

The Efficient Delivery of Highly Siderophile Elements to the Core Creates a Mass Accretion Catastrophe for the Earth

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The excess abundance of highly siderophile elements (HSEs), as inferred for the terrestrial planets and the Moon, is thought to record a “late veneer” of impacts after the giant impact phase of planet formation. Estimates for total mass accretion during this period typically assume all HSEs delivered remain entrained in the mantle.
Richard J. Anslow, Maylis Landeau, Amy Bonsor, Jonathan Itcovitz, Oliver Shorttle   +4 more
wiley   +1 more source

Interior Models of Mercury and Conditions for Iron Snow Formation in a Fe‐S‐Si Core

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Mercury's unique interior structure and magnetic field generation remain to be fully understood. We construct models to further constrain Mercury's interior and test the hypothesis that iron snow within the liquid core drives the dynamo.
Abigail H. Dunnigan, Dunyu Liu, Gregor B. Steinbrügge, Attilio Rivoldini, Mathieu Dumberry, Hao Cao, Krista M. Soderlund   +6 more
wiley   +1 more source

The next-generation Infrared astronomy mission SPICASpace Infrared Telescope for Cosmology & Astrophysics 3.5m cooled telescope mission for mid-and far-infrared astronomy

The next-generation Infrared astronomy mission SPICASpace Infrared Telescope for Cosmology & Astrophysics 3.5m cooled telescope mission for mid-and far-infrared astronomy
第8回宇宙科学シンポジウム (2008年1月8日-9日. 宇宙航空研究開発機構宇宙科学研究本部(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県 8ｔh Space Science Symposium (January 8-9, 2008. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan 資料番号: SA6000056026 レポート番号: S2 ...
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