Welcome to Jupiter space: to one side looms the vast cloudy face of the largest planet in our Solar System; in the other appears a shrunken Sun, like a spotlight in the sky, with just 3% of the illumination from Earth orbit arriving here. This basic fact presented a major challenge to those planning ESA’s Jupiter Icy Moons Explorer, Juice, mission: how to make solar power work in such a gloomy environment, located an average 778 million km away from our parent star?
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Source: ESA Space Engineering & Technology