Results 41 to 50 of about 2,450 (224)

Preperihelion Development of Interstellar Comet 3I/ATLAS

The Astrophysical Journal Letters
We describe preperihelion optical observations of interstellar comet 3I/ATLAS taken during 2025 July–September using the Nordic Optical Telescope. Fixed aperture photometry of the comet is well described by a power-law function of heliocentric distance ...
David Jewitt, Jane Luu
doaj   +1 more source

TNO or Comet? The Search for Activity and Characterization of Distant Object 418993 (2009 MS9)

The Planetary Science Journal, 2023
The perihelion of the trans-Neptunian object (TNO) 2009 MS9 brings it close to the distance where some long-period comets are seen to become active.
Erica Bufanda, Karen J. Meech, Jan T. Kleyna, Olivier R. Hainaut, James M. Bauer, Haynes Stephens, Peter Veres, Marco Micheli, Jacqueline V. Keane, Robert Weryk, Richard Wainscoat, Devendra K. Sahu, Bhuwan C. Bhatt   +12 more
doaj   +1 more source

EDTA‐Functionalized Nanoscale Metal–Organic Framework for Onco‐Cardiology via Radiochemotherapy Synergy and Spatiotemporally Matched Iron Chelation

Advanced Science, EarlyView.
Doxorubicin (DOX)‐induced cardiotoxicity is a major limitation to its broader clinical application, while cardioprotective interventions often risk reducing the anticancer efficacy of DOX. To address these challenges, this work constructs an EDTA‐functionalized metal–organic framework that enhances tumor therapy and provides efficient cardioprotection ...
Daojing Yuan, Liyang Tian, Luwen Zhuang, Yongyu Liang, Lingfei Chen, Xuetao Wang, Yanli Li, Xiyong Yu, Teng Gong   +8 more
wiley   +1 more source

Watching a Comet Turn On: High Spectral Resolving Power Observations of Comet C/2017 K2 (PanSTARRS)

The Planetary Science Journal
We report high spectral resolving power optical observations of comet C/2017 K2 (PanSTARRS) as it approached the Sun. This comet was discovered when it was 16 au from the Sun. At discovery, the comet had a large and relatively bright coma.
Anita L. Cochran, Adam J. McKay, Youssef Moulane   +2 more
doaj   +1 more source

The Collisional Evolution of the Primordial Kuiper Belt, Its Destabilized Population, and the Trojan Asteroids

The Planetary Science Journal, 2023
The tumultuous early era of outer solar system evolution culminated when Neptune migrated across the primordial Kuiper Belt (PKB) and triggered a dynamical instability among the giant planets.
William F. Bottke, David Vokrouhlický, Raphael Marschall, David Nesvorný, Alessandro Morbidelli, Rogerio Deienno, Simone Marchi, Luke Dones, Harold F. Levison   +8 more
doaj   +1 more source

Alternative Policy Designs to Help Farmers Select Profitable Conservation Practices

Agribusiness, EarlyView.
ABSTRACT Voluntary private carbon initiatives (VPCIs) promote the implementation of agricultural conservation practices that mitigate emissions of greenhouse gases (GHGs) via financial incentives to participating farmers. Simultaneously, an array of public policies supports the adoption of conservation practices through technical and financial ...
Oranuch Wongpiyabovorn, Alejandro Plastina   +1 more
wiley   +1 more source

Crater Observing Bioinspired Rolling Articulator (COBRA)

Advanced Intelligent Systems, EarlyView.
Crater Observing Bio‐inspired Rolling Articulator (COBRA) is a modular, snake‐inspired robot that addresses the mobility challenges of extraterrestrial exploration sites such as Shackleton Crater. Incorporating snake‐like gaits and tumbling locomotion, COBRA navigates both uneven surfaces and steep crater walls.
Adarsh Salagame, Henry Noyes, Eric Sihite, Arash Kalantari, Alireza Ramezani   +4 more
wiley   +1 more source

Finding the imprints of stellar encounters in long-period comets [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
The solar system's Oort cloud can be perturbed by the Galactic tide and by individual passing stars. These perturbations can inject Oort cloud objects into the inner parts of the solar system, where they may be observed as the long-period comets (periods longer than 200 years).
Feng, Fabo, Bailer-Jones, C. A. L.
openaire   +2 more sources

Correlations Between Osteocyte Lacuno‐Canalicular Network and Material Characteristics in Healthy and Mechanically Stimulated Murine Tibiae

Advanced NanoBiomed Research, EarlyView.
This article reveals how calcium content, mineral nanostructure, and lacuno‐canalicular network (LCN) organization interact to shape bone heterogeneity in mouse tibiae. Advanced multimodal imaging uncovers that mechanical loading promotes mature mineral structures even in low‐calcium regions, highlighting LCN‐driven mineralization and offering new ...
Victoria Schemenz, Maximilian Rummler, Alexander van Tol, Isabela Vitienes, Tobias Thiele, Markus A. Hartmann, Manfred Burghammer, Peter Fratzl, Richard Weinkamer, Bettina M. Willie, Wolfgang Wagermaier   +10 more
wiley   +1 more source

How Meteor Showers Can Guide the Search for Long-period Comets

The Planetary Science Journal
With orbital periods longer than 200 yr, most long-period comets (LPCs) remain undiscovered until they are in-bound toward perihelion. The comets that pass close to Earth’s orbit are potentially hazardous objects.
Samantha Hemmelgarn, Nicholas Moskovitz, Stuart Pilorz, Peter Jenniskens   +3 more
doaj   +1 more source