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Showing 1–12 of 12 results
Advanced filters: Author: A. Longobardo Clear advanced filters

  • Infrared spectra of (1) Ceres acquired at distances of 82,000 to 4,300 kilometres from the surface indicate widespread ammoniated phyllosilicates; the presence of ammonia suggests that material from the outer Solar System was incorporated into Ceres.

    • M. C. De Sanctis
    • E. Ammannito
    • C. T. Russell
    Research
    Nature
    Volume: 528, P: 241-244

  • Although olivine was expected to occur within the deep, south-pole basins of asteroid Vesta, which are thought to be excavated mantle rocks, spectral data from NASA’s Dawn spacecraft show that it instead occurs as near-surface materials in Vesta’s northern hemisphere.

    • E. Ammannito
    • M. C. De Sanctis
    • J. M. Sunshine
    Research
    Nature
    Volume: 504, P: 122-125

  • Spectral analysis of the VIRTIS dataset shows two opposite seasonal colour cycles in the coma and on the surface of comet 67P/Churyumov–Gerasimenko, indicating an orbital water-ice cycle.

    • Gianrico Filacchione
    • Fabrizio Capaccioni
    • Stefano Mottola
    Research
    Nature
    Volume: 578, P: 49-52

  • Family 1 glycosidases (GH1) are present in the three domains of life and share classical TIM-barrel fold. Structural and biochemical analyses of a resurrected ancestral GH1 enzyme reveal heme binding, not known in its modern descendants. Heme rigidifies the TIM-barrel and allosterically enhances catalysis.

    • Gloria Gamiz-Arco
    • Luis I. Gutierrez-Rus
    • Jose M. Sanchez-Ruiz
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-16

  • The seasonal colour variations of comet 67P’s nucleus observed in the visible wavelengths by the VIRTIS mapping spectrometer throughout the whole Rosetta mission are driven by the evolution of metre-scale water-enriched blocks homogeneously distributed across the nucleus, periodically exposed to sunlight by CO2 sublimation.

    • Mauro Ciarniello
    • Marco Fulle
    • Gabriele Arnold
    Research
    Nature Astronomy
    Volume: 6, P: 546-553

  • A refined analysis of infrared observations of comet 67P/Churyumov–Gerasimenko from the VIRTIS instrument on board the Rosetta spacecraft has revealed the presence of aliphatic organic molecules on the comet nucleus.

    • A. Raponi
    • M. Ciarniello
    • C. Leyrat
    Research
    Nature Astronomy
    Volume: 4, P: 500-505

  • Observations of water ice on the surface of comet 67P/Churyumov–Gerasimenko show the ice appearing and disappearing in a cyclic pattern that follows local illumination conditions, providing a source of localized activity and leading to cycling modification of the ice abundance on the surface.

    • M. C. De Sanctis
    • F. Capaccioni
    • G. Peter
    Research
    Nature
    Volume: 525, P: 500-503