The deployment of ESA's Mercury Planetary Orbiter (MPO) solar array is tested as part of #BepiColombo's launch preparations at Europe's Spaceport in Kourou. The solar array is not yet installed on the MPO module, which can be seen in the back left corner of the image. The ESA Mercury Transfer Module's arrays were tested earlier in the launch campaign and already installed on the spacecraft module. See more pics at http://ow.ly/tMNp30liKJ5