How much water lurks beneath an exoplanet's surface?

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How much water lurks beneath an exoplanet's surface? New tool could help astronomers tell

A new technique could help determine how much water is locked up in minerals beneath an exoplanet's surface.

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Astronomers hunting for water on alien planets have a new tool in their arsenal.

This comes in the form of a water-hunting technique that uses an exoplanet's size to estimate how much of this vital ingredient for life as we know it dwells beneath its surface. 

The tool could also help astronomers better understand how extrasolar planets that are born around violent young stars "bounce back" from their fiery births and tumultuous early years.

Read More: Space.com