Results 161 to 170 of about 8,069 (192)
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Probing the internal structure of the nuclei of comets
Planetary and Space Science, 2009There is no direct evidence about the internal structure of cometary nuclei, which are mostly hidden by their gas and dust comae, and have not yet been orbited by any spacecraft. Their densities are low, typically of about 400 kg m−3 for 9P/Tempel 1 (that was impacted by the Deep Impact probe) and 67P/Churyumov–Gerasimenko (that is the target of the ...
Levasseur-Regourd, Anny Chantal +3 more
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Comet nuclei: Morphology and implied processes of surface modification
Planetary and Space Science, 2006Abstract Surface morphology and related issues for nuclei of three comets: Halley, Borrelly and Wild 2, are considered in the paper. Joint consideration of publications and results of our analysis of the comets’ images led to conclusions, partly new, partly repeating conclusions published by other researchers.
Basilevsky, A., Keller, H.
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Actin cables and comet tails organize mitochondrial networks in mitosis
Nature, 2021Andrew S Moore +2 more
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Cometary nuclei preserve clues to our early solar system and spectroscopic studies of both their surfaces and surrounding comae—clouds of gas and dust that activate during solar approach—offer critical insight into their composition and evolution. Specifically, cometary surface spectra reveal the materials present on the object’s outermost layers ...
Aren Beck +2 more
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Aren Beck +2 more
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Spectroscopic identification of water emission from a main-belt comet
Nature, 2023Michael S Kelley +2 more
exaly
An orbital water-ice cycle on comet 67P from colour changes
Nature, 2020Gianrico Filacchione +2 more
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Comet nuclei primordial aggregation effects on their internal structure
2009Comet nuclei have a low density ( 500 kg.m-3, e.g. [1]) and are easily disrupted. In situ studies have unveiled surface features hinting at a pervasive internal layered structure on 9P/Tempel 1 [2]. This indicates that specific processes occurred during its formation and lifetime.
Lasue, Jérémie +4 more
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Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun
Science, 2015Alessandra Rotundi +2 more
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