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Titan solar occultation observations reveal transit spectra of a hazy world
Fortney, Jonathan J.; Maltagliati, Luca; Marley, Mark S. +1 more
High altitude clouds and hazes are integral to understanding exoplanet observations, and are proposed to explain observed featureless transit spectra. However, it is difficult to make inferences from these data because of the need to disentangle effects of gas absorption from haze extinction. Here, we turn to the quintessential hazy world -- Titan…
Orbital apocenter is not a sufficient condition for HST/STIS detection of Europa's water vapor aurora
Nimmo, Francis; Saur, Joachim; Roth, Lorenz +4 more
We report far-ultraviolet observations of Jupiter's moon Europa taken by Space Telescope Imaging Spectrograph (STIS) of the Hubble Space Telescope (HST) in January and February 2014 to test the hypothesis that the discovery of a water vapor aurora in December 2012 by local hydrogen (H) and oxygen (O) emissions with the STIS originated from plume a…