There’s plenty of evidence that Pluto is a frozen water world, with mountains of ice that rise more than 10,000 feet in height, but here’s something even weirder: Huge chunks of frozen H2O appear to be floating in a sea of frozen nitrogen, like icebergs in Earth’s polar regions.
Those are among the findings reported on Feb. 4 in this week’s update from NASA’s New Horizons mission. The piano-sized New Horizons spacecraft collected gigabytes’ worth of observations last year during its July 14 flyby, and it’s been sending back data ever since then.
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