Results 21 to 30 of about 113,206 (352)
The Astrophysical Formation of Asymmetric Molecules and the Emergence of a Chiral Bias
Life, 2019 The biomolecular homochirality in living organisms has been investigated for decades, but its origin remains poorly understood. It has been shown that circular polarized light (CPL) and other energy sources are capable of inducing small enantiomeric ...
Adrien D. Garcia +5 more
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Collision probabilities of migrating small bodies and dust particles with planets [PDF]
, 2009 Probabilities of collisions of migrating small bodies and dust particles produced by these bodies with planets were studied. Various Jupiter-family comets, Halley-type comets, long-period comets, trans-Neptunian objects, and asteroids were considered ...
Drake, Ipatov, Ipatov, Sergei I. Ipatov
core +1 more source
CO2: A Small Ubiquitous Molecule With a Lot of Astrochemical Debate Attached
Frontiers in Astronomy and Space Sciences, 2020 Water, carbon monoxide and carbon dioxide are the most abundant molecules in the condensed phase of interstellar dust grains. Water is formed by hydrogenation of oxygen species adsorbed on the surface of dust grains, while carbon monoxide is formed by ...
Jan Hendrik Bredehöft
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Mechanical Properties of Cometary Surfaces
Universe, 2022 Mechanical properties, in particular, strength (tensile, shear, compressive) and porosity, are important parameters for understanding the evolution and activity of comets. However, they are notoriously difficult to measure.
Jens Biele +2 more
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Application of the regularization method to differential equations of comets' motion
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2009 Regularization method for differential equation of comets' motion is used. Numerical integration of the equation of motion of 10 short-period comets during the period of 1800 to 2204 with the use of osculating elements of the large planets is done.
A. F. Zausaev, L. A. Solov'ev
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Activity of Comets Constrains the Chemistry and Structure of the Protoplanetary Disk
Universe, 2022 Recent data of molecular clouds and protoplanetary disks constrain the composition and structure of the disk and planetesimals. Laboratory experiments suggest that dust accretion in disks stops at pebble sizes. Sublimation and recondensation of water ice
Marco Fulle
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Universe, 2023 The Neil–Gehrels Swift Observatory has added extensively to our understanding of small bodies in our solar system through its capabilities to rapidly respond to short-live events such as outbursts and collisions, through its near-ultraviolet coverage ...
Dennis Bodewits +3 more
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Monte Carlo Models of Comet Dust Tails Observed from the Ground
Universe, 2022 Dust particles leaving the comet nucleus surface are entrained by the gas within the first few nuclear radius distances and are subjected to a complex hydrodynamical environment.
Fernando Moreno
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Chemical Convection and Stratification in the Earth's Outer Core
Frontiers in Earth Science, 2019 Convection in the Earth's outer core is driven by buoyancy sources of both thermal and compositional origin. The thermal and compositional molecular diffusivities differ by several orders of magnitude, which can affect the dynamics in various ways.
Mathieu Bouffard +3 more
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MUPUS insertion device for the Rosetta mission
Journal of Telecommunications and Information Technology, 2023 An original mechanical device designed to insert a penetrator into a cometary nucleus in an almost gravityfree environment is described. The device comprises a hammer and a power supply system that stores electrical energy in a capacitor.
Jerzy Grygorczuk +3 more
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