A5102993581- Astro and Planetary Science
- Planetary Science and Exploration
- Isotope Analysis in Ecology
- Metallurgy and Cultural Artifacts
- Fluid Dynamics Simulations and Interactions
- X-ray Diffraction in Crystallography
- Chemical and Physical Properties of Materials
- Spacecraft and Cryogenic Technologies
- Physics of Superconductivity and Magnetism
- Crystallization and Solubility Studies
- Geology and Paleoclimatology Research
- Magnetic properties of thin films
- Radioactivity and Radon Measurements
- Space Science and Extraterrestrial Life
- Global Energy and Sustainability Research
- Soil Carbon and Nitrogen Dynamics
- Earth Systems and Cosmic Evolution
- High-pressure geophysics and materials
- Scientific Research and Discoveries
- Inorganic Fluorides and Related Compounds
- Radioactive contamination and transfer
- Ship Hydrodynamics and Maneuverability
- Nuclear Physics and Applications
- ZnO doping and properties
Planetary Science Institute
2020-2025
University of Arizona
2020-2025
Lunar and Planetary Institute
2020
The University of Tokyo
2020
Kyoto University
2004
International Superconductivity Technology Center
1995
Okayama University
1988
Abstract On September 24, 2023, NASA's OSIRIS‐REx mission dropped a capsule to Earth containing ~120 g of pristine carbonaceous regolith from Bennu. We describe the delivery and initial allocation this asteroid sample introduce its bulk physical, chemical, mineralogical properties early analyses. The is very dark overall, with higher‐reflectance inclusions particles interspersed. Particle sizes range submicron dust stone ~3.5 cm long. Millimeter‐scale larger stones typically have hummocky or...
Abstract Evaporation or freezing of water-rich fluids with dilute concentrations dissolved salts can produce brines, as observed in closed basins on Earth 1 and detected by remote sensing icy bodies the outer Solar System 2,3 . The mineralogical evolution these brines is well understood regard to terrestrial environments 4 , but poorly constrained for extraterrestrial systems owing a lack direct sampling. Here we report occurrence salt minerals samples asteroid (101955) Bennu returned...
The composition of asteroids and their connection to meteorites provide insight into geologic processes that occurred in the early Solar System. We present spectra Nightingale crater region on near-Earth asteroid Bennu with a distinct infrared absorption around 3.4 micrometers. Corresponding images boulders show centimeters-thick, roughly meter-long bright veins. interpret veins as being composed carbonates, similar those found aqueously altered carbonaceous chondrite meteorites. If are...
On 24 September 2023, the NASA OSIRIS-REx mission dropped a capsule to Earth containing approximately 120 g of pristine carbonaceous regolith from Bennu. We describe delivery and initial allocation this asteroid sample introduce its bulk physical, chemical, mineralogical properties early analyses. The is very dark overall, with higher-reflectance inclusions particles interspersed. Particle sizes range sub-micron dust stone about 3.5 cm long. Millimeter-scale larger stones typically have...
Abstract The observation of carbonate veins on asteroid Bennu supports the idea that large‐scale water flow may have occurred in carbonaceous asteroids early solar system. We identified and analyzed 11 boulders with layered structures Bennu's surface using high‐resolution (centimeter‐scale) image altimetry data obtained by OSIRIS‐REx mission. boulders' linear layer boundaries parallel bedding follow principle original horizontality suggest they formed from sediment deposition fluid parent...
Abstract Earth-Like is an interactive website and twitter bot that allows users to explore changes in the average global surface temperature of Earth-like planet due variations oceans emerged land coverage, rate volcanism (degassing) level received solar radiation. The calculated using a simple carbon–silicate cycle model change CO 2 atmosphere based on chosen parameters. can achieve range exceeding −100°C 100°C by varying all three parameters, including freeze-thaw cycles for with our...
In anoxic marine sediments sulfur is considered to be essential the formation of humic substances. It also estimated that may play a crucial role in degradation wood buried sediments. order confirm this prediction, we observed tissue fossil from clay aged 1.1 million years by polarizing microscopy and SEM before determination its content PIXE EDXA, distribution μ-PIXE. Results show sample contained about 6000 μg/g total tracheid cells with birefringence, which have probably preserved...