Planetary Science

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Earth

WATER, WATER EVERYWHERE  Earth is a wet planet that formed in a dry part of the solar system. How our planet’s water arrived may be a story of big, bullying planets and ice-filled asteroids. 

Mosaic of Vesta

SPACE ROCK  A colossal mountain on the south pole of Vesta, seen in this mosaic of images from the Dawn spacecraft, is one of the locales to explore in Vesta Trek.

illustration of Messenger over Mercury

The MESSENGER spacecraft, illustrated here with actual images of Mercury’s cratered landscape captured by the probe in an early flyby of the planet in 2008, ended its four-year mission April 30. 

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