What Do We Know About Stars? (1:51)
Life Cycles of Stars (5:25)
What Do We Know About the Sun? (6:10)
The Sun's Importance to Earth (2:32)
The Sun's Past and Future (2:21)
How Big is Space? (13:24)
Relativity Theory (10:33)
Low Energy Radiation (4:11)
High Energy Radiation (4:15)
The Hubble Space Telescope (3:05)
Neutron Stars and Pulsars (4:15)
The Interstellar Medium (2:36)
The US Manned Space Program (0:57)
Where Have We Gone Since the Moon? (4:36)
The Mir Space Station (3:07)
The International Space Station (3:03)
Living with Weightlessness (6:23)
Human or Robotic Explorations? (0:53)
The Future of Space Exploration (3:36)
Why Explore Space? (2:10)
Have They Already Been Here? (3:21)
The Search for Extraterrestrial Intelligence (6:05)
Extrasolar Planets (6:18)