A dwarf planet between Mars and Jupiter has a salty ocean beneath its surface, making it a contender for alien life

A NASA spacecraft just discovered a hidden ocean in our solar system. The agency's Dawn probe orbited the dwarf planet Ceres, which sits inside the asteroid belt between Mars and Jupiter, for three years before running out of fuel in 2018. At one point, Dawn zipped 22 miles, or 35 kilometers, above the small world's surface. Scientists are still studying the data it gathered, since it offers an up-close look at some bright regions on Ceres that they'd been scratching their heads over for years.

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