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Hi, I’m Jim Green, Director of Planetary
Science at NASA.

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NASA works with the international science
community to explore our solar system and

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beyond.

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We look to unravel the mysteries that intrigue
us all as we explore and answer big questions,

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like:

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How did Earth originate and change over time,
and how did the solar system begin and evolve,

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and what will be its destiny.

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What will be our destiny?

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Last July 14th, NASA’s New Horizons spacecraft
flew past Pluto, capping a half century of

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exploration of our solar system.

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It piqued our interest about what lies beyond
Pluto, and what can we learn about the origins

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of the solar system.

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The idea of a new planet is certainly an exciting
one for me as a planetary scientist and I

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think for all of us.

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The January 20th paper in the Astronomical
Journal is fueling our interest in planetary

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exploration and stimulating a healthy debate
that’s part of the scientific process.

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I couldn’t be more please about what’s
happening.

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It’s the start of a process that could lead
to an exciting result.

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It is not, however, the detection of a new
planet.

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It’s too early to say with certainty there’s
a so-called Planet X out there.

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What we’re seeing is an early prediction
based on modeling from limited observations.

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What’s exciting is that, like NASA’s journey
to Mars or New Horizons’ flyby of Pluto,

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you will have a front row seat to see how
the scientific process unfolds.

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Theories like this serve to stimulate ideas
and conversation.

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They tap into our innate curiosity.

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It’s important for us to continue the work,
and we will.

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Anytime we have an interesting idea like this,
we always apply Carl Sagan’s rules for critical

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thinking, which include independent confirmation
of the facts, looking for alternate explanations,

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and encouraging scientific debate.

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If Planet X is out there, we’ll find it
together.