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that supports HTML5 video  TEST Video Carolyn Porco flies us to
Saturn   Please install flash or upgrade to a browser that
supports HTML5 video  Audio MP3 Download Podcast  Duration:
17:13  In the next 18 minutes, I'm going to take you on a
journey.  And it's a journey that you and I have been on for
many years now, and it began some 50 years ago, when humans
first stepped off our planet. And in those 50 years, not only
did we literally, physically set foot on the moon, but we have
dispatched robotic spacecraft to all the planets -- all eight of
them -- and we have landed on asteroids, we have rendezvoused
with comets, and, at this point in time, we have a spacecraft on
its way to Pluto, the body formerly known as a planet. And all
of these robotic missions are part of a bigger human journey: a
voyage to understand something, to get a sense of our cosmic
place, to understand something of our origins, and how Earth,
our planet, and we, living on it,