Scientific Technology:Carolyn Porco Flies Us to Saturn
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.
- Added：2010
- Country：USA
- Duration：20
- Time of update：2011/9/19 14:42:39