Results 41 to 50 of about 1,838 (234)
Mineralogy and Surface Composition of Asteroids [PDF]
, 2015 Methods to constrain the surface mineralogy of asteroids have seen considerable development during the last decade with advancement in laboratory spectral calibrations and validation of our interpretive methodologies by spacecraft rendezvous missions. This has enabled the accurate identification of several meteorite parent bodies in the main asteroid ...
Reddy, Vishnu +4 more
openaire +2 more sources
Bulk Thermal Conductivity of Granular Aggregates: Decoupling Coordination Number and Porosity
The Planetary Science JournalBoth internal evolution and orbital dynamics of asteroids are influenced by the thermal conductivity of their surface regolith and boulders, yet the microstructural factors that control it remain poorly constrained.
Bhuvan Agrawal +8 more
doaj +1 more source
Surface Geology of Jupiter’s Trojan Asteroids
Space Science Reviews, 2023 AbstractThe surface geology of Jupiter’s Trojan asteroids is one of the scientific investigations of the NASALucymission. A dedicated Geology Working Group will implement these studies using primarily panchromatic and color imaging data and complement the interpretation of these data with theoretical models, such as collisional evolution models ...
S. Marchi +3 more
openaire +1 more source
Predicting Performance of Hall Effect Ion Source Using Machine Learning
Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.This study introduces HallNN, a machine learning tool for predicting Hall effect ion source performance using a neural network ensemble trained on data generated from numerical simulations. HallNN provides faster and more accurate predictions than numerical methods and traditional scaling laws, making it valuable for designing and optimizing Hall ...
Jaehong Park +8 more
wiley +1 more source
Low thrust propulsion in a coplanar circular restricted four body problem
, 2012 This paper formulates a circular restricted four body problem (CRFBP), where the three primaries are set in the stable Lagrangian equilateral triangle configuration and the fourth body is massless.
Biggs, James +2 more
core +1 more source
Simulating the (99942) Apophis Earth Flyby Using a Contact Binary Model
The Planetary Science JournalThis paper investigates the mass shifts of asteroid (99942) Apophis during its 2029 close encounter with Earth, using the contact dynamics method, a type of discrete element method. Unlike previous analyses, we model the asteroid as a contact binary body
Hai-Shuo Wang +2 more
doaj +1 more source
Sm and Gd Isotopic Shifts in Eucrites and Implications for Their Cosmic-Ray Exposure History
The Astrophysical Journal, 2023 The isotopic compositions of Sm and Gd in eight eucrites—five from a desert, Dar al Gani (DaG) 380, DaG 391, DaG 411, DaG 443, and DaG 480, and three from nondesert areas, Juvinas, Millibillillie, and Stannern—were determined to understand the cosmic-ray
Takaharu Saito +2 more
doaj +1 more source
Regolith mechanics on Asteroid surfaces [PDF]
, 2017 Introduction: It is very likely that most aster- oids surfaces are covered by a regolith layer. We are focussing on the mechanical properties of such regolith, i.e., a granular material under micro-gravity (µ-g) conditions. Any operations on asteroids that are not remote, need to interact mechanically with the surface material, and for resource ...
Biele, Jens, Ulamec, Stephan
openaire +2 more sources
Deep Underground Science and Engineering, EarlyView.High atmospheric pressure (120 kPa) in deep underground counteracts humidity‐induced physiological stress in plants, stabilizing water balance and enhancing antioxidative defenses. This synergy boosts biomass despite elevated humidity, demonstrating sustainable deep underground agriculture potential under climate uncertainty.
Yuxin He +6 more
wiley +1 more source
Experimental analysis of laser ablated plumes for asteroid deflection and exploitation
, 2013 It has been theoretically demonstrated that laser ablation is effective in the potential deflection and mitigation of asteroids. However, there have been few experimental studies to support this claim.
Watson, Ian +5 more
core +1 more source