For 85 years after its discovery, Pluto was little more than a dot in a telescope — until 2015, when a piano-sized NASA spacecraft that had traveled more than three billion miles flew past and revealed a world with a 1,000-kilometer heart-shaped glacier of froze - 19FortyFive
For 85 years Pluto was barely more than a dot in a telescope. Then in 2015 NASA's New Horizons flew past after a nine-year, three-billion-mile journey and revealed a 1,000-kilometer heart-shaped nitrogen glacier and a surface impossibly young — and the probe …

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