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Showing 1–4 of 4 results
Advanced filters: Author: Eleonora Ammannito Clear advanced filters

  • Double Asteroid Redirection Test (DART) mission impacted Dimorphos to test asteroid deflection. Here, the authors show that post-impact spectra largely match pre-impact properties, with only subtle variations probably linked to mutual events and to the evolution of the ejecta dust.

    • Monica Lazzarin
    • Fiorangela La Forgia
    • Andrew S. Rivkin
    ResearchOpen Access
    Nature Communications
    Volume: 17, P: 1-14

  • 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

  • Observations of infrared emission from CO2, O2 and NO established that photochemical and dynamic activity controls the structure of the upper atmosphere of Venus, but were unable to identify the altitude of the emission. But it is reported here that day-side CO2 emission extends from 90–120 km altitude, with a peak at ∼115 km. Night-side O2 emission peaks at 96 km and is visible over the range 95–100 km.

    • P. Drossart
    • G. Piccioni
    • Bernd Ulmer
    Research
    Nature
    Volume: 450, P: 641-645

  • Venus has a bright 'dipole' double-eye feature at the centre of a vast vortex that rotates around the north pole, and is surrounded by a cold 'collar'. Observations of Venus' south polar region are reported, where clouds with morphology much like those around the north pole are seen, but rotating somewhat faster.

    • G. Piccioni
    • P. Drossart
    • Bernd Ulmer
    Research
    Nature
    Volume: 450, P: 637-640