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Illustration of exoplanet 55 Cancri e

The partially molten surface of 55 Cancri e (left, illustrated) might periodically be blanketed by volcanic dust (right), which could explain observed temperature swings of over 1,000 degrees Celsius.

Westerlund 2

EYE IN THE SKY  A stellar nursery 20,000 light-years from Earth known as Westerlund 2 showcases the Hubble Space Telescope’s sharp vision in an image taken in honor of the observatory’s 25th anniversary.

Illustration of Kepler 11

FIRST DRAFT  The solar system may have once hosted several large rocky planets close to the sun, like Kepler 11 (illustrated) does, before Jupiter swept them away.

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