CAPE CANAVERAL, Fla. (AP) — In a tantalizing first, scientists have discovered water at a planet outside our solar system that has temperatures suitable for life.

Two research groups announced this week that they've found water vapor in the atmosphere of a planet 110 light-years away in the constellation Leo. This so-called Super Earth is just the right distance from its star to conceivably harbor life.

It's the only exoplanet known so far to have both water and temperatures needed for life, the University College London team reported in the journal Nature Astronomy on Wednesday. But lead auth...