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  1. Aurorae on Uranus detected by Hubble

    Source:

    • Sciences et techniques

    Publishing date:

    April 13, 2012

    Among all the known planetary magnetospheres, these gaps carved in the solar wind by magnetized planets (especially the Earth and giant planets), the exotic case of Uranus had been very little studied because of its remote location (19.2 AU away from the Sun, i.e. almost 3 billions km).

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  2. Gale in an exoplanet's atmosphere

    Source:

    • Sciences et techniques

    Publishing date:

    June 26, 2012

    Using the Hubble Space Telescope (NASA/ESA), the astronomers observed important changes in the upper atmosphere of a remote planet. Just after a strong eruption on its host star was observed in the X-rays range, the planet experienced a violent atmospheric escape. It was the first time such detailed observation of variations in the atmosphere of an extrasolar planet was performed; this result contributed to our knowledge of climatic variations and meteorological alterations in extreme conditions.

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