Since its launch in 1990, the Hubble Space Telescope has captured thousands of stunning images of space, revolutionized our understanding of the universe, and become a global icon. To mark Hubble's 25th anniversary, National Geographic Channel tells the definitive story of one of NASA's most successful science projects ever, in Hubble's Cosmic Journey. Narrated by astrophysicist Neil deGrasse Tyson, Hubble's Cosmic Journey carries revealing interviews with the key players behind the telescope, the astronauts who fixed it, and astrophysicists including Stephen Hawking.