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Planetary Science

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Saturn's ring system

FULL CIRCLE  Saturn’s ring system is incredibly complex, as shown in this image taken by NASA’s Cassini spacecraft in 2013.

HAT-P-26b illsutration

WET AND WILD  The exoplanet HAT-P-26b, illustrated here, has relatively low levels of heavy elements in its atmosphere, compared with those found in Neptune's atmosphere. As a result, the exoplanet may have had a different origin story than ice giants in our solar system.

comet 67P

OLD OR NEW? Molecular oxygen detected around comet 67P, shown here, may not be a relic of the solar system’s birth. Instead, it may be generated by interactions of water, the solar wind and sand on the comet’s surface.

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