Water Worlds May Be Common in the Universe

by Joel Hruska

Researchers presenting at the Goldschmidt conference in Boston are arguing that the number of planets with significant amounts of water in their atmospheres or crusts may be much higher than previously thought. If true, this could have negative implications for our search for life elsewhere in our galaxy.

“This is water, but not as commonly found here on Earth,” said Dr. Zeng. “Their surface temperature is expected to be in the 200 to 500 degree Celsius range. Their surface may be shrouded in a water-vapor-dominated atmosphere, with a liquid water layer underneath. Moving deeper, one would expect to find this water transforms into high-pressure ices before we reaching the solid rocky core. The beauty of the model is that it explains just how composition relates to the known facts about these planets.”

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