Results 21 to 30 of about 245 (87)

Impact Reactivation of a Hydrothermal System in Basalt in the Vargeão Dome Impact Structure, Brazil

open access: yesJournal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract As hydrous minerals have been observed in impact craters on Mars, impact‐generated hydrothermal systems (IGHSs) have been considered as potential habitats for life on that planet. The Vargeão Dome, a 12 km wide impact structure in southern Brazil, was formed in basalts with at least two hydrothermal alteration stages.
Jitse Alsemgeest   +5 more
wiley   +1 more source

Microimaging Spectroscopy of Carbonaceous Chondrites and Comparison to the Spectral Diversity of Asteroids

open access: yesJournal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Primitive asteroids and carbonaceous chondrites (CCs) record the history of processes in the early solar system. Visible and shortwave infrared (VSWIR) spectroscopy of primitive asteroids and bulk‐powdered CCs has identified shared spectral features suggestive of shared parent body origins.
S. A. Parra   +2 more
wiley   +1 more source

Small but mighty: Impact hazards from iron Near‐Earth Objects

open access: yesMeteoritics &Planetary Science, Volume 61, Issue 2, Page 224-240, February 2026.
Abstract Small asteroids can impact Earth unexpectedly, as demonstrated by the Chelyabinsk event in 2013. The warning times are likely to be short, and the first tools for fast hazard predictions have been developed in the last years for encounters with rocky or cometary objects, which quickly fragment in the atmosphere and cause airbursts. However, in
Robert Luther   +5 more
wiley   +1 more source

Perspective Projection of an Ellipse and an Ellipsoid for Analytical View Factor Evaluation

open access: yesHeat Transfer, Volume 55, Issue 1, Page 44-55, January 2026.
ABSTRACT Radiative view factors are fundamental quantities for evaluating radiative heat transfer between different surfaces. While analytical expressions of view factors have been evaluated for various types of basic geometries, including circular disks and spheres, extending these solutions to more complex geometries, such as ellipses and ellipsoids ...
Kaname Sasaki
wiley   +1 more source

A Systemic Reflection On Why Biology Is Best : E(s) ∞ mc2 Sentience, Consciousness and Transcendance?

open access: yesSystems Research and Behavioral Science, Volume 43, Issue 1, Page 78-82, January/February 2026.
ABSTRACT The short essay makes a case that a post biological world will be a devolution. Sentience is a relational process linked with the awe and wonder we experience in relation to one another and our shared habitat. The voiceless need to be protected by extending solidarity on the basis of sentience—a normative plea, but also on the basis of ...
J. J. McIntyre‐Mills
wiley   +1 more source

New Insolation Forcing for Paleoclimate Studies

open access: yesPaleoceanography and Paleoclimatology, Volume 41, Issue 1, January 2026.
Abstract Insolation forcing at the top of the atmosphere is widely used in paleoceanographic and paleoclimatological studies. In paleoclimate simulations, it must reflect Earth’s orbital history. General Circulation Models (GCMs) typically use a modern orbital configuration to allow direct comparison to modern and near‐future scenarios, often with time
I. J. Kocken, R. E. Zeebe
wiley   +1 more source

JAXA curation for Bennu samples returned by the NASA's OSIRIS‐REx mission

open access: yesMeteoritics &Planetary Science, Volume 61, Issue 1, Page 182-207, January 2026.
Abstract NASA's OSIRIS‐REx mission successfully collected and returned ~121.6 g of bulk samples from the B‐type, near‐Earth asteroid (101955) Bennu to Earth in September 2023. Upon returning to Earth, the samples were transported to the NASA Johnson Space Center where most of the samples have been stored and processed.
Rui Tahara   +34 more
wiley   +1 more source

Description and modeling of the Jiddat al Harasis 091 L5 strewn field

open access: yesMeteoritics &Planetary Science, Volume 61, Issue 1, Page 107-121, January 2026.
Abstract With a size of 51.2 × 7.2 km, the 10.9 ± 1.7 ka old Jiddat al Harasis 091 L5 chondrite strewn field is the largest known in Oman. It consists of more than 700 meteorites with a total mass of >4.5 tons from which the largest six stones of >100 kg to 1.5 tons make up two thirds of the total mass.
Karl Wimmer   +5 more
wiley   +1 more source

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