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Mostrando 881 - 900 Resultados de 962 Para Buscar '"Solar System"', tiempo de consulta: 0.90s Limitar resultados
  1. 881
    “…Similar features do not exist anywhere else in the imaged solar system. Here we analyze the geomorphology and composition of the features and conclude this region was resurfaced by cryovolcanic processes, of a type and scale so far unique to Pluto. …”
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    Large-scale cryovolcanic resurfacing on Pluto
  2. 882
    “…Here we describe the possible solar system regions of origin for Psyche, prior to its likely implantation into the asteroid belt, the physical and chemical processes that can enrich metal in an asteroid, and possible meteoritic analogs. …”
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    Distinguishing the Origin of Asteroid (16) Psyche
  3. 883
    “…This distribution of absorption depth leads to a differential comet size distribution proportional to [Formula: see text] , where [Formula: see text] , showing a striking similarity to the size distribution of comets in the Solar system and the distribution of a collisionally relaxed population ([Formula: see text] ).…”
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    Exocomets size distribution in the [Formula: see text] Pictoris planetary system
  4. 884
    “…The search for life in the universe is often informed by the study of “extreme” environments on Earth, which provide analogs for habitable locations in the Solar System, and whose microbial inhabitants may therefore also serve as analogs for potential life forms in extraterrestrial milieus. …”
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    Modeling Virus and Bacteria Populations in Europa’s Subsurface Ocean
  5. 885
    “…Comparison in terms of environmental and cost impacts of renewable energy (hybrid solar system) with non-renewable energy sources, water and planning development authority (WAPDA), and diesel generators (DGs) has been examined in the household sector of Pakistan. …”
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    A comparative analysis of renewable and non-renewable energy generation to relegate CO(2) emissions and general costs in household systems
  6. 886
    “…The present work uses Cassini data as a case study as these data are similar to space physics and planetary missions at Earth and other solar system objects. We build off a previous effort applying a semi-supervised physics-based classification of plasma instabilities in Saturn’s magnetic environment, or magnetosphere. …”
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    Incorporating Physical Knowledge Into Machine Learning for Planetary Space Physics
  7. 887
    “…It has been hypothesized that life on Earth (and elsewhere in the solar system) could have originated in an alkaline hydrothermal system, however all other studied alkaline submarine hydrothermal systems to date are fueled by serpentinization. …”
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    Microbial ecology of a shallow alkaline hydrothermal vent: Strýtan Hydrothermal Field, Eyjafördur, northern Iceland
  8. 888
    por Al-Khalili, Jim, 1962-
    Publicado 2011
    Libro
    The house of wisdom : how Arabic science saved ancient knowledge and gave us the Renaissance /
  9. 889
    Publicado 2009
    “…During this time, the particles make four hundred million revolutions of the machine, travelling a distance equivalent to the diameter of the solar system. The beams must travel in a pipe which is emptied of air, to avoid collisions between the particles and air molecules (which are considerably bigger than protons). …”
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    Section of LHC beampipe
  10. 890
    “…Since the energy flux of space weather, which generated frequent SEPs from the young Sun in the first 600 million years after the birth of the solar system, was expected to be much greater than that of GCRs, we conclude that SEP-driven energetic protons are the most promising energy sources for the prebiotic production of bioorganic compounds in the atmosphere of the Hadean Earth.…”
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    Formation of Amino Acids and Carboxylic Acids in Weakly Reducing Planetary Atmospheres by Solar Energetic Particles from the Young Sun
  11. 891
    “…We also provide an outlook for in situ experiments on the Moon and Mars, and welcome new possibilities to support the search for exoplanets and potential biosignatures within and beyond our solar system.…”
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    Future space experiment platforms for astrobiology and astrochemistry research
  12. 892
    “…Samples from the carbonaceous asteroid (162173) Ryugu provide information on the chemical evolution of organic molecules in the early solar system. Here we show the element partitioning of the major component ions by sequential extractions of salts, carbonates, and phyllosilicate-bearing fractions to reveal primordial brine composition of the primitive asteroid. …”
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    Chemical evolution of primordial salts and organic sulfur molecules in the asteroid 162173 Ryugu
  13. 893
    “…Identifying how such compounds could have formed prior to life is therefore a critical step in understanding the origin of life and the potential for life elsewhere in the solar system and beyond. One class of biomolecule crucial to modern life are nucleic acids, which carry the genetic code and are integral to cellular replication and function. …”
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    Mineral-Mediated Oligoribonucleotide Condensation: Broadening the Scope of Prebiotic Possibilities on the Early Earth
  14. 894
    “…These data contribute new insights into the complexity of lipid structures generated in actively serpentinizing environments and provide valuable context to aid in the reconstruction of past microbial activity from fossil lipid records of terrestrial serpentinites and the search for biosignatures elsewhere in our solar system.…”
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    Intact polar lipidome and membrane adaptations of microbial communities inhabiting serpentinite-hosted fluids
  15. 895
    “…RATIONALE: The geologic history of the Solar System builds on an extensive record of impact flux models, crater counts, and ∼270 kg of lunar samples analyzed in terrestrial laboratories. …”
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    Dating the Martian meteorite Zagami by the (87)Rb-(87)Sr isochron method with a prototype in situ resonance ionization mass spectrometer
  16. 896
    “…More than 50 years of space and planetary exploration and concomitant studies of terrestrial impact structures have demonstrated that impact cratering has been a fundamental process – an essential part of planetary evolution – ever since the beginning of accretion and has played a major role in planetary evolution throughout the solar system and beyond. This not only pertains to the development of the planets but to evolution of life as well. …”
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    Impact structures in Africa: A review
  17. 897
    “…Dating of previously un‐sampled young lunar basalts, which generally have a KREEP‐rich composition, is critical for understanding the bombardment history of the Moon since 3.5 Ga, which in turn informs the chronology of the solar system. Measurements of lunar analogs like the Duluth Gabbro are a proof of concept for in situ dating of rocks on the Moon to constrain lunar history. …”
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    Rb‐Sr resonance ionization geochronology of the Duluth Gabbro: A proof of concept for in situ dating on the Moon
  18. 898
    “…Detection of extant microbial life on Earth and elsewhere in the Solar System requires the ability to identify and enumerate micrometer-scale, essentially featureless cells. …”
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    Digital Holographic Microscopy, a Method for Detection of Microorganisms in Plume Samples from Enceladus and Other Icy Worlds
  19. 899
    “…Given that formation of a stable primordial crust is the end product of planetary differentiation, our data require that the accretion, core formation and magma ocean crystallization on Mars was completed <20 Myr after Solar System formation. These timescales support models suggesting rapid magma ocean crystallization leading to a gravitationally unstable stratified mantle, which subsequently overturns resulting in decompression melting of rising cumulates and extraction of a primordial basaltic to andesitic crust6,7.…”
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    Evidence for extremely rapid magma ocean crystallization and crust formation on Mars
  20. 900
    “…The mere presence of organic compounds is not a biosignature: there is widespread distribution of reduced organic molecules in the Solar System. Life utilizes a select few of these molecules creating conspicuous enrichments of specific molecules that deviate from the distribution expected from purely abiotic processes. …”
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    The Cell and the Sum of Its Parts: Patterns of Complexity in Biosignatures as Revealed by Deep UV Raman Spectroscopy
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