I never met Sagan, although a few years ago Nomi and I had the pleasure of meeting his son Nick at the Boston World Science Fiction Convention. But it would not be exaggerating to say that Sagan had a major influence on my life. His PBS TV show Cosmos came out when I was a kid, and I was enthralled by it. I watched every episode of the show as many times as I could. We didn't have a VCR then, and DVDs didn't exist, so my only chance to watch it was when PBS chose to broadcast it.
I remember certain scenes vividly, such as the scenes with actors portraying Tycho Brahe and Johannes Kepler, as Sagan discussed the history behind our understanding of planetary motion. I loved the spaceship of the mind that Sagan rode through the universe, allowing viewers to witness astronomical phenomena up close. And I will never forget the lesson imparted by the final episode, "Who Speaks for Earth?" in which Sagan told his viewers that all of us living on the planet have the right to speak for Earth.
For years afterwards, I read Sagan's books, always delighted by the plain-spoken way in which he presented difficult concepts. Although there were points with which I disagreed with Sagan, I always appreciated the way he made me think. If I had to credit any one person with inculcating a love of astronomy in me, it would have to be Carl Sagan.
Years later, when I found myself teaching astronomy, I made a point of showing as many episodes of Cosmos as I could to my classes. I can only hope they got the same sense of wonder out of the series that I did.