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>> HUBBLE HAS DISCOVERED WATER
VAPOR ON A SUPER EARTH

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>> The Hubble Space Telescope
has made the very first
detection of water...

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>> ...in the atmosphere of an
exoplanet orbiting in its star's
habitable zone.

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>> The habitable zone is the
region around a star where

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>> temperatures would let liquid
water exist on a planet's
surface.

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>> K2-18b, which is eight times
the mass of Earth, is the first
planet outside the solar system

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>> in the habitable zone
known to have water in its
atmosphere.

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>> Using Hubble data, scientists
analyzed the starlight filtered
through K2-18b’s atmosphere.

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>> The team found the molecular
signature of water vapor
in the planet’s atmosphere.

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>> Located 110 light-years from
Earth, K2-18b orbits a dwarf
star that’s much smaller, cooler, and more active than

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>> the Sun, which could affect
its atmosphere and environment.

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>> While we won’t be able
to know if it’s truly habitable...

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>> we’ll use future
telescopes, like the James Webb
Space Telescope, to seek answers to one of the biggest questions.

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>> Is Earth unique?

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