Results 41 to 50 of about 110,880 (237)
Nature Communications, 2019 Polycyclic aromatic hydrocarbons (PAHs) represent key molecular building blocks in extraterrestrial environments but the understanding of their formation and growth in this environment has remained elusive.
Long Zhao +8 more
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Nucleobase synthesis in interstellar ices
Nature Communications, 2019 The formation of nucleobases can take place in extraterrestrial environments. Here the authors show the simultaneous synthesis of three purine nucleobases and three pyrimidine from interstellar ice analogues that suggest the evolution from molecular ...
Yasuhiro Oba +4 more
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Geosciences, 2018 We briefly present preliminary results of our study of the radioresistant bacteria in a low temperature and pressure and high-radiation environment and hypothesize the ability of microorganisms to survive extraterrestrial high-radiation environments ...
Anatoly Pavlov +5 more
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Powered Landing Control of Reusable Rockets Based on Softmax Double DDPG
Aerospace, 2023 Multi-stage launch vehicles are currently the primary tool for humans to reach extraterrestrial space. The technology of recovering and reusing rockets can effectively shorten rocket launch cycles and reduce space launch costs.
Wenting Li +4 more
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The Space Experiment of the Exo-ecosystem [PDF]
arXiv, 2023 The experiment of exo-ecosystem and the exploration of extraterrestrial habitability aims to explore the adaptation of terrestrial life in space conditions for the manned space program and the future interstellar migration, which shows great scientific significance and public interests. By our knowledge the early life on Earth, archaea and extremophile
arxiv
Laboratory Studies of Methane and Its Relationship to Prebiotic Chemistry [PDF]
ASTROBIOLOGY, Volume 17, Number 8, 2017, 2018 In order to examine how the terrestrial life emerged, a number of laboratory experiments have been conducted since the 1950s. Methane has been one of the key molecules in these studies. In earlier studies, strongly reducing gas mixtures containing methane and ammonia were mainly used to simulate possible reactions in primitive Earth atmosphere, and ...
arxiv +1 more source
Two types of mirror mode waves in the Kronian magnetosheath
Earth and Planetary Physics, 2023 A mirror mode wave is a fundamental magnetic structure in the planetary space environment that is persistently compressed by solar wind, especially in the magnetosheath.
XinYa Duanmu +3 more
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Learning and Autonomy for Extraterrestrial Terrain Sampling: An Experience Report from OWLAT Deployment [PDF]
arXiv, 2023 Extraterrestrial autonomous lander missions increasingly demand adaptive capabilities to handle the unpredictable and diverse nature of the terrain. This paper discusses the deployment of a Deep Meta-Learning with Controlled Deployment Gaps (CoDeGa) trained model for terrain scooping tasks in Ocean Worlds Lander Autonomy Testbed (OWLAT) at NASA Jet ...
arxiv
Exploring, Mapping, and Data Management Integration of Habitable Environments in Astrobiology
Frontiers in Microbiology, 2019 New approaches to blending geoscience, planetary science, microbiology-geobiology/ecology, geoinformatics and cyberinfrastructure technology disciplines in a holistic effort can be transformative to astrobiology explorations.
Marjorie A. Chan +8 more
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Life, 2021 This work is a review of the experiments carried out in the Russian segment of the ISS (inside and outside) from 2005 to 2016 on the effect of the space flight factor on the resting stages of organisms.
Victor R. Alekseev +2 more
doaj +1 more source