Results 21 to 30 of about 462,957 (252)

Imagining a new era of planetary field geology [PDF]

open access: yesScience Advances, 2019
Kip V. Hodges Harrison H. Schmitt July marked the beginning of a 3-year-long celebration of one of the most remarkable periods of human exploration in history: the Apollo missions to the Moon. Reflections on Apollo have inspired a renewed international interest in sustained lunar exploration.
Hodges, K. V., Schmitt, H. H.
openaire   +2 more sources

Planetary Geology: Extraterrestrial Model of Geology

open access: yes, 2019
Planetary geology is an interdisciplinary subject that develops from astronomy and geology. This subject mainly studies the formation and evolution of solid celestial bodies in the Solar System such as planets, satellites, asteroids, comets, and ...
Zhiyong, XIAO   +5 more
core   +1 more source

Occurrence of Ionospheric Equatorial Ionization Anomaly at 840 km Height Observed by the DMSP Satellites at Solar Maximum Dusk

open access: yesSpace Weather, 2021
Although it is accepted that the electron density double peaks of the Equatorial Ionization Anomaly (EIA) generally merge into a single‐peak with increasing altitude and thus the signature of EIA becomes inconspicuous in the higher topside ionosphere, it
Jiacheng Li   +6 more
doaj   +1 more source

A New Method for Retrieving Electron Density Profiles from the MARSIS Ionograms

open access: yesRemote Sensing, 2022
The Martian ionosphere was actively detected by Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) aboard the Mars Express. The detected echo signal of the MARSIS at an epoch is presented as a function of frequency and time delay to form
Wendong Liu   +9 more
doaj   +1 more source

Simulations of Io Plasma Torus Around Jupiter: Predictions for Lenghu Observatory

open access: yesEarth and Space Science, 2023
Characterizing the temporal evolution of the three‐dimensional structure of the Io plasma torus is essential to understand the dynamics of the Jovian magnetosphere. Optical imaging is a powerful tool to uncover the global torus structure.
Xiaoyi Tan   +6 more
doaj   +1 more source

Manual of suggested procedures for the state-wide paleontologic-mineralogic survey in Texas

open access: yes, 1939
This manual was prepared by the Bureau of Economic Geology, The University of Texas, to be used in connection with the Works Progress Administration state-wide paleontologic-mineralogic survey.University of Texas.
Evans, Glen L. (Glen Louis), 1911-
core   +1 more source

Electrochemical Pathways for Nitrate Conversion to Ammonia: From Environmental Challenges to Ammonia Economy

open access: yesAdvanced Functional Materials, EarlyView.
This perspective presents recent advances in electrocatalytic nitrate reduction, focusing on reaction mechanisms, catalyst design, and electrolyzer configurations. Key challenges in selectivity, stability, and practical wastewater treatment are highlighted, while future directions for advancing sustainable ammonia synthesis and nitrate remediation are ...
Xintong Li   +9 more
wiley   +1 more source

Geology of the Selk crater region on Titan from Cassini VIMS observations [PDF]

open access: yes, 2010
International audienceObservations of Titan obtained by the Cassini Visual and Infrared Mapping Spectrometer (VIMS) have revealed Selk crater, a geologically young, bright-rimmed, impact crater located similar to 800 km north-northwest of the Huygens ...
Brown, R.H.   +19 more
core   +1 more source

Mapping Paleolacustrine Deposits with a UAV-borne Multispectral Camera: Implications for Future Drone Mapping on Mars

open access: yesThe Planetary Science Journal
NASA’s Ingenuity Mars Helicopter has marked a new era in planetary exploration by employing unmanned aerial vehicles (UAVs) to enhance our understanding of planetary surfaces.
Gayantha R. Kodikara   +3 more
doaj   +1 more source

Advanced MXene‐Based Multifunctional Nanoarchitecture Materials Engineered for Adsorptive Cleanup of Hazardous Radioactive Pollutants: A Comprehensive Critical Review

open access: yesAdvanced Materials Interfaces, EarlyView.
This work critically reviews MXenes as highly effective multifunctional nanomaterials for the adsorption of radio‐contaminants, demonstrating a remarkable adsorption capacity of up to 1376.75 mg/g and cyclic stability of 2–8 cycles, with complexation, electrostatic interactions, and the numerical strength of MXene active sites playing a key operational
Stephen Sunday Emmanuel   +1 more
wiley   +1 more source

Home - About - Disclaimer - Privacy