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Hubble directly measures rotation of cloudy ‘super-Jupiter’ exoplanet
Astronomers using NASA’s Hubble Space Telescope have measured the rotation rate of an extreme exoplanet by observing the varied brightness in its atmosphere. The planet, called 2M1207b, is about four times more massive than Jupiter and is dubbed a “super-Jupiter.” This is the first measurement of the rotation of a massive exoplanet using direct imaging.