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Showing 1–5 of 5 results
Advanced filters: Author: N. Rowe-Gurney Clear advanced filters

  • JWST has detected \({{\rm{H}}}_{3}^{+}\) and auroral emissions at Neptune—the only giant planet in the Solar System for which they had proved to be elusive up to now. The observations reveal a factor-of-two cooling of Neptune’s upper atmosphere compared with Voyager 2 data, indicative of energy balance processes acting on a shorter timescale than solar forcing.

    • Henrik Melin
    • Luke Moore
    • Katie L. Knowles
    ResearchOpen Access
    Nature Astronomy
    Volume: 9, P: 666-671

  • JWST and Keck II spectral observations of Saturn’s moon Titan reveal methyl (CH3) as well as non-local thermodynamic equilibrium emission bands of CO and CO2. Imaging shows clouds in Titan’s northern hemisphere at several epochs, with some appearing to evolve in altitude.

    • Conor A. Nixon
    • Bruno Bézard
    • Robert A. West
    Research
    Nature Astronomy
    Volume: 9, P: 969-981

  • The extensive water plume that originates from Enceladus and extends up to 40 Enceladus radii is mapped and characterized by JWST. Data suggest a sustained and uninterrupted plume activity spanning decades and a surface dominated by crystalline H2O ice. No other molecules were detected in gaseous form.

    • G. L. Villanueva
    • H. B. Hammel
    • K. Denny
    Research
    Nature Astronomy
    Volume: 7, P: 1056-1062

  • The visible–near-infrared spectrum of the dark spot that appeared on Neptune in 2018 indicates the presence of material that makes the aerosol layer at 5 bar darker at visible wavelengths. Such material can come from deeper layers via upwelling or by sublimation of H2S ice that reveals the darker condensation nuclei.

    • Patrick G. J. Irwin
    • Jack Dobinson
    • Statia L. Cook
    Research
    Nature Astronomy
    Volume: 7, P: 1198-1207

  • In the Spitzer Space Telescope’s 16 years of operation, it observed many Solar System objects and environments. In this second Review Article of a pair, Spitzer’s insight into asteroids, dust clouds and rings and the ice giant planets are summarized.

    • David E. Trilling
    • Carey Lisse
    • Anne Verbiscer
    Reviews
    Nature Astronomy
    Volume: 4, P: 940-946