In 1994, Tyson joined the Hayden Planetarium as a staff scientist while he was a research affiliate in Princeton University. He became acting director of the planetarium in June 1995 and was appointed director in 1996. As director, he oversaw the planetarium's $210 million reconstruction project, which was completed in 2000. Upon being asked for his thoughts on becoming director, Tyson said "when I was a kid... there were scientists and educators on the staff at the Hayden Planetarium... who invested their time and energy in my enlightenment... and I've never forgotten that... to end up back there as its director, I feel this deep sense of duty, that I serve in the same capacity for people who come through the facility today, that others served for me".