Article
Geosciences, Multidisciplinary
A. Deniau, Q. Nenon, N. Andre, C. Mazelle, A. Rahmati, C. M. Fowler, A. R. Poppe, J. P. McFadden, J. S. Halekas, E. Penou
Summary: Scientists have analyzed measurements from MAVEN's encounters with Phobos and found that the protons observed near the Martian moon do not come from backscattering by Phobos, but rather from other sources such as foreshock-shock foot protons and Martian exospheric pickup protons. These findings have implications for previous observations and future missions.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Q. Nenon, A. R. Poppe, A. Rahmati, J. P. McFadden
Summary: The escaping ions from Mars's atmosphere impact its moon Phobos asymmetrically, leading to differences in flux distribution and accelerated weathering. This may provide valuable information for future sample return missions.
Article
Engineering, Aerospace
Nicola Baresi, Diogene A. Dei Tos, Hitoshi Ikeda, Yasuhiro Kawakatsu
Summary: The Martian Moons eXploration mission aims to retrieve samples from the surface of Phobos, with the spacecraft planned to enter quasi-satellite orbits upon arrival for over three years of study. The paper presents the orbit design and maintenance strategy within the framework of the elliptic Hill problem, including numerical continuation procedures and sensitivity analyses to ensure the robustness of the mission trajectories.
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
(2021)
Article
Astronomy & Astrophysics
A. Wargnier, T. Gautier, O. Poch, P. Beck, E. Quirico, A. Buch, T. Drant, Z. Perrin, A. Doressoundiram
Summary: The Martian Moon eXploration mission by JAXA aims to explore Phobos and Deimos and understand their origins. In this study, the detectability of organics on Phobos was investigated using laboratory spectral analogues. The results show that organic compounds can be detected on Phobos when their volume content exceeds 5%. These findings will be useful for interpreting the data collected by the MMX Infrared Spectrometer (MIRS) onboard the spacecraft.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Geography, Physical
Zhihui Zhang, Dawei Lv, Man Lu, Zicheng Yu, Yuan Gao, Tiantian Wang, Jie Gao, Chengshan Wang
Summary: The study shows that the frequency of wildfires during the Middle Jurassic period is related to seasonal dry climate cycles induced by long eccentricity of Earth's orbit. This suggests that despite decreasing Earth's eccentricity, current human-induced climate change has already increased the risk of wildfires.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Environmental Sciences
Zhen Zhong, Qilin Wen, Jianguo Yan, Lijun Pang
Summary: This study models the interior structure of Phobos and calculates its mean density and moment of inertia. The results suggest a core radius of around 8.2 km, a core density of approximately 2500 kg/m³, and an outer layer density of around 1400 kg/m³. The methodology can be applied to studying the interior structure of irregularly shaped asteroids.
Article
Geography, Physical
I. M. Van Waveren, M. Booi, J. H. A. Van Konijnenburg-Van Cittert, M. J. Crow
Summary: This paper focuses on the fluctuations of plant diversity in three ecosystems on the volcanic slope of West Sumatra, revealing the impact of glacial-interglacial cycles on ancient vegetation during the Holocene. Isotopic age evaluation of rock sections shows the evolution of different vegetation types over time.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Proceedings Paper
Engineering, Aerospace
Stefan Barthelmes, Ralph Bayer, Wieland Bertleff, Markus Bihler, Fabian Buse, Maxime Chalon, Guenther Geyer, Franz Hacker, Cynthia Hofmann, Roman Holderried, Alexander Kolb, Erich Kraemer, Viktor Langofer, Roy Lichtenheldt, Sascha Moser, Andre Fonseca Prince, Kaname Sasaki, Hans-Juergen Sedlmayr, Juliane Skibbe, Bernhard Vodermayer
Summary: The German Aerospace Center (DLR) has developed a wheeled rover for Phobos, the moon of Mars, which has a very low gravity. This is the first time that wheeled locomotion has been tested in such a low gravity environment. The results of this experiment are important for future missions and the development of driving gears for low gravity environments.
2023 IEEE AEROSPACE CONFERENCE
(2023)
Article
Chemistry, Multidisciplinary
Qiang Tang, Xiaofeng Liu, Xiaxia Cui, Zhenpeng Su, Huai Zheng, Jau Tang, Sang Woo Joo
Summary: The study demonstrates droplet manipulation on nonslippery polymer surfaces using corona discharge, allowing for directional transport of droplets and revealing the dependence of motion on critical and driving distances. The driving mechanism is verified through experiments and simulations, enriching droplet manipulation techniques for various applications.
Article
Physics, Fluids & Plasmas
Jun Yoshioka, Tasuku Sakikawa, Yuki Ito, Koji Fukao
Summary: Marangoni flow driven by a temperature gradient was observed near the isotropic-nematic phase transition point. The direction of the flow was opposite in the isotropic and nematic phase, and depended on the coating materials in the coexistence state.
Article
Chemistry, Physical
Abraha Tadese Gidey, Elias Assayehegn, Jung Yong Kim
Summary: This study investigates the influence of metal oxide charge-transport layers (CTLs) on the properties of organometal halide perovskite solar cells (PSCs), revealing that the hydrophilicity of CTLs can drive the growth of MAPbI3 crystalline grains and impact the overall power conversion efficiency. Hydrophilic surfaces of CTLs lead to larger perovskite grain sizes, while the highest efficiency is achieved when SnO2 is used as the electron-transport layer in planar heterojunction PSCs.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Astronomy & Astrophysics
Z. J. Yan, Y. F. Gao, Y. Yu, L. Z. Shu, X. Y. Zeng, J. Lv
Summary: In the past decades, space missions to small bodies have provided us with vast new knowledge about our solar system. In situ observations by these missions have shown the complexity and diversity of the spatial environment around target asteroids. Understanding the motion of objects in these complex environments is crucial for studying the evolution history of surface/subsurface materials on asteroids.
EARTH AND SPACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Yueling Guo, Junyang He, Zhiming Li, Xiaoxiang Wu, Wenjun Lu, Changmeng Liu
Summary: In this study, the rare-earth element alloying strategy was used to tune the microstructure and mechanical properties of a refractory high entropy alloy. The alloying of trace Y intensified solidification segregation and drove the microstructural evolution. The experiments showed a slight beneficial effect of the alloying on the compressive strength and fracture strain.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Leon Topp, Lena Haddick, Dominik Maehlmann, Andreas Heuer
Summary: On homogeneous substrates, droplets slide due to external forces, but on substrates with wettability gradients, sliding occurs without external forces due to internal driving forces. Molecular dynamics simulations were used to study the complex behavior of droplets driven by both external and internal forces. The sliding velocity is nearly constant during the sliding process, mainly determined by the initial substrate's mobility and the desorption of particles at the receding contact line. The effective force is the sum of the external force and a renormalized internal force, which represents stronger dissipation effects when driven by wettability gradients.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Zhen-Zhou Nie, Meng Wang, Shuai Huang, Zhi-Yang Liu, Hong Yang
Summary: This paper reports a light-fueled soft actuator based on a Seifert ribbon, capable of multimodal self-sustainable movements. The Seifert ribbon actuator can self-sense the adjustment of illumination area, enabling adaptive switches between self-sustained oscillatory and rotary motions. These two motion modes are applied to piezoelectric generation and cargo transport. The smartness of Seifert surface topology advances actuation intelligence with broad implications for adaptability, multifunctionality, and autonomy of soft robots.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Astronomy & Astrophysics
Onur Celik, Ronald-Louis Ballouz, Daniel J. Scheeres, Yasuhiro Kawakatsu
Summary: Small solar system objects are covered with varying depth of granular material, which can be mobilized from their surfaces at different speeds. However, low-speed impacts under relevant gravity levels have not been extensively studied. This study uses discrete-element method simulations to investigate low-speed cratering in microgravity and discusses the implications of the results.
Article
Geosciences, Multidisciplinary
E. B. Bierhaus, D. Trang, R. T. Daly, C. A. Bennett, O. S. Barnouin, K. J. Walsh, R. -l. Ballouz, W. F. Bottke, K. N. Burke, M. E. Perry, E. R. Jawin, T. J. McCoy, H. C. Connolly, M. G. Daly, J. P. Dworkin, D. N. DellaGiustina, P. L. Gay, J. I. Brodbeck, J. Nolau, J. Padilla, S. Stewart, S. Schwartz, P. Michel, M. Pajola, D. S. Lauretta
Summary: This study investigates the impact of impactor characteristics and target surface physics on crater formation on the asteroid Bennu. The results show that the population of boulders controls the transition from crater formation to armouring. The estimated crater retention age of Bennu's surface is significantly younger than previous estimates.
Article
Geosciences, Multidisciplinary
M. E. Perry, O. S. Barnouin, R. T. Daly, E. B. Bierhaus, R. -L. Ballouz, K. J. Walsh, M. G. Daly, D. N. DellaGiustina, M. C. Nolan, J. P. Emery, M. M. Al Asad, C. L. Johnson, C. M. Ernst, E. R. Jawin, P. Michel, D. R. Golish, W. F. Bottke, J. A. Seabrook, D. S. Lauretta
Summary: Observations of deposits associated with a crater on the rubble-pile asteroid Bennu suggest a surface with low strength that is easily reworked by impacts. The discovery of a downslope avalanche also indicates a surface composed of materials that can be easily mobilized by impacts and may have undergone multiple renewals since Bennu's initial assembly.
Article
Geosciences, Multidisciplinary
Marco Delbo, Kevin J. Walsh, Christophe Matonti, Justin Wilkerson, Maurizio Pajola, Manar M. Al Asad, Chrysa Avdellidou, Ronald-Louis Ballouz, Carina A. Bennett, Harold C. Connolly, Daniella N. DellaGiustina, Dathon R. Golish, Jamie L. Molaro, Bashar Rizk, Stephen R. Schwartz, Dante S. Lauretta
Summary: Fractures on the asteroid Bennu imaged by the OSIRIS-REx spacecraft are consistent with cracking induced by diurnal temperature variations over geologically rapid timescales.
Article
Engineering, Aerospace
Naoya Ozaki, Takayuki Yamamoto, Ferran Gonzalez-Franquesa, Roger Gutierrez-Ramon, Nishanth Pushparaj, Takuya Chikazawa, Diogene Alessandro Dei Tos, Onur Celik, Nicola Marmo, Yasuhiro Kawakatsu, Tomoko Arai, Kazutaka Nishiyama, Takeshi Takashima
Summary: DESTINY+ is an upcoming mission by JAXA to fly by the Geminids meteor shower parent body Phaethon. It will demonstrate advanced technologies and solutions for important challenges in space exploration. The mission is divided into three phases and faces multiple challenges. This paper presents a practical approach to tackle these complex problems and provides a detailed flight operations plan.
Article
Engineering, Aerospace
Daniel Villegas-Pinto, Nicola Baresi, Slim Locoche, Daniel Hestroffer
Summary: Motivated by the upcoming exploration of cislunar space, this study investigates dynamical substitutes for Earth-Moon's resonant Near-Rectilinear Halo Orbits (NRHOs) under the Elliptic-Circular Restricted Four-Body Problem formulation. By incorporating the Sun's influence and the Moon's eccentricity, the study replaces resonant periodic NRHOs of the Earth-Moon Circular Restricted Three-Body Problem with two-dimensional quasi-periodic tori that better represent the dynamics of satellites near the Moon. The study presents the steps and algorithms to compute these dynamical structures and assess their usefulness for spacecraft missions, focusing on specific resonant orbits and their advantageous properties.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Engineering, Aerospace
Nicola Baresi, Lamberto Dell'Elce
Summary: This paper introduces a new time-periodic set of equations of motion that better describes the dynamic evolution of a spacecraft in planetary moon systems. The resulting periodic and quasi-periodic trajectories are investigated for future trajectory design of planetary moon explorers.
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
(2023)
Article
Engineering, Aerospace
Nicolo Bernardini, Nicola Baresi, Roberto Armellin
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
(2023)
Article
Engineering, Aerospace
Edoardo Ciccarelli, Nicola Baresi
Summary: Understanding the internal composition of a celestial body is crucial for formulating theories about its origin. Analyzing moments of inertia and gravity field can provide deep insights into the distribution of mass beneath the body's crust. The Martian moons have not been extensively studied, posing questions about their origin and requiring further characterization. The Martian Moons eXploration mission aims to study Phobos over a prolonged period to refine our knowledge about its libration angle and gravitational field.
Article
Astronomy & Astrophysics
Daniella N. Dellagiustina, Michael C. Nolan, Anjani T. Polit, Michael C. Moreau, Dathon R. Golish, Amy A. Simon, Coralie D. Adam, Peter G. Antreasian, Ronald-Louis Ballouz, Olivier S. Barnouin, Kris J. Becker, Carina A. Bennett, Richard P. Binzel, Brent J. Bos, Richard Burns, Nayessda Castro, Steven R. Chesley, Philip R. Christensen, M. Katherine Crombie, Michael G. Daly, R. Terik Daly, Heather L. Enos, Davide Farnocchia, Sandra Freund Kasper, Rose Garcia, Kenneth M. Getzandanner, Scott D. Guzewich, Christopher W. Haberle, Timothy Haltigin, Victoria E. Hamilton, Karl Harshman, Noble Hatten, Kyle M. Hughes, Erica R. Jawin, Hannah H. Kaplan, Dante S. Lauretta, Jason M. Leonard, Andrew H. Levine, Andrew J. Liounis, Christian W. May, Laura C. Mayorga, Lillian Nguyen, Lynnae C. Quick, Dennis C. Reuter, Bashar Rizk, Heather L. Roper, Andrew J. Ryan, Brian Sutter, Mathilde M. Westermann, Daniel R. Wibben, Bobby G. Williams, Kenneth Williams, C. W. V. Wolner
Summary: The OSIRIS-REx spacecraft mission collected a sample from asteroid Bennu and will divert to encounter asteroid Apophis in a second mission called APEX. This close encounter with Apophis in 2029 will be the largest object to approach Earth in recorded history and may alter its orbit and structure. APEX will observe and record the consequences of tidal disturbance on the asteroid, providing high-resolution data and insights into stony asteroids.
PLANETARY SCIENCE JOURNAL
(2023)
Article
Astronomy & Astrophysics
M. Pajola, O. S. Barnouin, A. Lucchetti, M. Hirabayashi, R. -L. Ballouz, E. Asphaug, C. M. Ernst, V. Della Corte, T. Farnham, G. Poggiali, J. M. Sunshine, E. Mazzotta Epifani, N. Murdoch, S. Ieva, S. R. Schwartz, S. Ivanovski, J. M. Trigo-Rodriguez, A. Rossi, N. L. Chabot, A. Zinzi, A. Rivkin, J. R. Brucato, P. Michel, G. Cremonese, E. Dotto, M. Amoroso, I. Bertini, A. Capannolo, A. Cheng, B. Cotugno, M. Dall'Ora, R. T. Daly, V. Di Tana, J. D. P. Deshapriya, I. Gai, P. H. A. Hasselmann, G. Impresario, M. Lavagna, A. Meneghin, F. Miglioretti, D. Modenini, P. Palumbo, D. Perna, S. Pirrotta, E. Simioni, S. Simonetti, P. Tortora, M. Zannoni, G. Zanotti
Summary: This research discusses the impact of the DART spacecraft on the Dimorphos satellite of the Didymos system and explores the observation and mapping strategies. By studying geological features and processes on other NEAs, the impact conditions that DART might encounter on Dimorphos are assessed.
PLANETARY SCIENCE JOURNAL
(2022)
Article
Astronomy & Astrophysics
O. S. Barnouin, E. R. Jawin, R. T. Daly, R. -l. Ballouz, M. G. Daly, J. A. Seabrook, P. Michel, Y. Zhang, C. L. Johnson, K. J. Walsh, M. M. Al Asad, R. Gaskell, J. Weirich, E. Palmer, E. B. Bierhaus, M. C. Nolan, C. W. V. Wolner, D. S. Lauretta
Summary: This study explores the geology of the sample collection site on the asteroid Bennu by the OSIRIS-REx spacecraft, revealing the materials of varying brightnesses, compositions, and exposure ages that may be included in the sample.
PLANETARY SCIENCE JOURNAL
(2022)
Article
Astronomy & Astrophysics
Bin Cheng, Erik Asphaug, Ronald-Louis Ballouz, Yang Yu, Hexi Baoyin
Summary: The parallel grooves on the surface of the Martian moon Phobos are still enigmatic and have important implications for understanding the origin of Mars and its satellites. By simulating the extension of a regolith shell driven by tidal strain, we confirm the model that the grooves on Phobos are formed by orbital decay. The grooves are likely formed by the drainage of loose material into deep-seated valleys caused by fracture opening.
PLANETARY SCIENCE JOURNAL
(2022)
Proceedings Paper
Engineering, Aerospace
Roman Kruzelecky, Piotr Murzionak, Qi-Yang Peng, Ian Sinclair, Michel Corriveau, Edward Cloutis, Alexis Parkinson, Brynn Dagdick, Amelie St-Amour, Yang Gao, Chris Bridges, Nicola Baresi, Andrea Lucca Fabris, Samantha Rowe, Nuno Silva, Paulo Rosa, Mauro Gameiro, Roger Walker, Johan Vennekens
Summary: The Lunar Volatile and Mineralogy Mapping Orbiter (VMMO) is a low-cost 12U Cubesat that consists of various components, including a Lunar Volatiles and Mineralogy Mapper (LVMM) payload, solar arrays, communications systems, and optional GPS receiver technology. The LVMM payload enables active and passive modes for mapping lunar volatiles and surface ilmenite, as well as a communications mode for optical data downlink demonstration. The VMMO project has completed the Phase A study with ESA and focuses on improving the spatial resolution of lunar mapping using fiber lasers.
CUBESATS AND SMALLSATS FOR REMOTE SENSING VI
(2022)
