Results 41 to 50 of about 282,415 (218)

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, Volume 43, Issue 7, Page 4475-4514, October 2026.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

A Comprehensive Model of Morphologically Realistic Cosmic Dust Particles: An Application to Mimic the Unusual Polarization Properties of the Interstellar Comet 2I/Borisov

The Astrophysical Journal, 2023
The cosmic dust particles found in space are mainly porous aggregates of smaller grains. Theoretically, these aggregates are replicated using fractal geometry, assuming a cluster of spheres.
Prithish Halder, Sujan Sengupta
doaj   +1 more source

Modeling the effects of a faint dust coma on asteroid spectra [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractIn this work we use a simple model to study the influence of a faint dust coma on asteroid spectra, in an effort to reproduce the unusual spectral behavior seen on the asteroid (5201) Ferraz-Mello and other objects.
Jorge Márcio Carvano, Silvia Lorenz-Martins   +1 more
openaire   +1 more source

Neutral Wind Control of Jupiter's Non‐Auroral Ionosphere

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract We use JAMMIES (JAMMIES is Another Model Making Ionospheric EStimates), a new model of Jupiter's non‐auroral ionosphere, to demonstrate that neutral wind‐driven field‐aligned plasma transport can explain decades of measurements inconsistent with a solar‐dominated ionosphere. Two observations highlight these inconsistencies: a minimum in H3+ ${\
K. Mohamed, O. Agiwal, L. Moore, I. Mueller‐Wodarg, J. D. Huba, C. Martinis, T. Stallard, H. Melin   +7 more
wiley   +1 more source

From heart to mind: A narrative review of incidence, risk factors, and mechanisms of dementia after cardiac surgery

Alzheimer's &Dementia, Volume 22, Issue 9, September 2026.
Abstract As cardiac surgery becomes more common, concerns about postoperative cognitive decline and the potential progression to dementia have grown. While postoperative cognitive dysfunction (POCD) is well documented, its relationship to long‐term dementia risk remains unclear.
Tina Esfandiary, Isia Cadieux, Renee S. McIntyre, Louise Y. Sun   +3 more
wiley   +1 more source

Interstellar Object 3I/ATLAS Observed from Mars by China’s Tianwen-1 Spacecraft

The Astrophysical Journal Letters
China’s Tianwen-1 Mars orbiter successfully imaged the third interstellar object, 3I/ATLAS, during its close encounter with Mars using the onboard HiRIC CMOS camera. This is China’s first deep-space observation of an astronomical object.
Xin Ren, Wei Yan, Ruining Zhao, Shu Wang, Xingye Gao, Qiang Fu, Qing Zhang, Bin Yang, Man-To Hui, Zhiyong Xiao, Xiaodong Liu, Cunhui Li, Renhao Tian, Wenguang Liu, Dong Wang, Shaoran Liu, Cong Ren, Jie Dong, Xinbo Zhu, Pan Xie, Jian-Yang Li, Yan Geng, Jianjun Liu   +22 more
doaj   +1 more source

Spatial Distribution and Color of Dust in Halley’s Inner Coma [PDF]

International Astronomical Union Colloquium, 1991
Abstract Composite images of the intensity of solar radiation scattered by dust in Halley’s coma are constructed by using the three-channel spectra obtained during the approach phase of the Vega 2 spacecraft. They cover a sector centered on the nucleus that has a radius of 40000 km and an angular extent of 50°.
J. Clairemidi, E. Brandon, P. Rousselot, G. Moreels   +3 more
openaire   +1 more source

The Anticoagulation Dilemma: Concurrent Traumatic Brain Hemorrhage and Cerebral Venous Thrombosis in a Blast Injury Patient

Clinical Case Reports, Volume 14, Issue 9, September 2026.
ABSTRACT Blast injuries produce complex multi‐system trauma through primary barotrauma, secondary penetrating projectiles, tertiary displacement forces, and quaternary mechanisms. Among the most challenging complications is the concurrent presentation of traumatic intracranial hemorrhage and cerebral venous sinus thrombosis (CVST), which creates a ...
Ayenew Amare, Mikiyas G. Teferi, Laltu M. Negasa, Tesfaye A. Haile, Selamawit M. Bonsu, Kalkidan P. Ageze, Gedefaw T. Minwagaw   +6 more
wiley   +1 more source

Modeling Ice and Dust in Comet C/2017 K2 (Pan-STARRS)’s Coma

The Planetary Science Journal
C/2017 K2 (Pan-STARRS) is a long-period comet that has been active since 24 au inbound and likely as far out as 35 au, far beyond where the sublimation of water ice can power cometary activity.
Megan Firgard, Theodore Kareta
doaj   +1 more source

Ice, Ice, Maybe? Investigating 46P/Wirtanen’s Inner Coma for Icy Grains

The Planetary Science Journal, 2023
The release of volatiles from comets is usually from direct sublimation of ices on the nucleus, but for very or hyperactive comets other sources have to be considered to account for the total production rates.
Theodore Kareta, John W. Noonan, Walter M. Harris, Alessondra Springmann   +3 more
doaj   +1 more source