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Dwarf Planets Aren't Big News, Because Astronomy Is Doing a Great Job

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Dwarf planet Ceres

This animated sequence of images from NASA's Dawn spacecraft shows northern terrain on the sunlit side of dwarf planet Ceres.


Last week, astronomers  announced the discovery of DeeDee, a possible dwarf planet. That name—dwarf planet—means it is like Pluto: Massive enough to assume a spherical shape due to its own gravitational force, but not quite big enough to control the region of space it inhabits.

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