• 46 Videos, Slides, Films

• 22 DVDs
• 1 Blu-ray Discs

• 12 Physics
• 12 Research
• 11 Astronomy
• 11 Quantum theory
• 6 Exploration
• 5 Hawking, Stephen, 1942-2018
• 5 Life (Biology)
• 4 Evolution (Biology)
• 4 Space and time
• 3 Discoveries in science
• 3 Gravity
• 3 History
• 3 Stars
• 2 Astronomical observatories
• 2 Astrophysicists
• 2 Big bang theory
• 2 Comets
• 2 Copernicus, Nicolaus, 1473-1543
• 2 Dark matter (Astronomy)
• 2 End of the universe
• 2 End of the world (Astronomy)
• 2 Evolution
• 2 Expanding universe
• 2 Extraterrestrial beings

• 22 Films Media Group
• 10 Annenberg Learner (Firm)
• 6 Hawking, Stephen, 1942-2018
• 5 Flight 33 Productions (Firm)
• 5 Lester, Adrian
• 5 Thompson, Erik, 1959-
• 4 Arts and Entertainment Network
• 4 BBC Worldwide Ltd.
• 4 History (Television network)
• 4 New Video Group
• 4 PBS Home Video
• 3 Cohen, Douglas J
• 3 DCD Media (Firm)
• 3 Dolan, Samuel K
• 3 Public Broadcasting Service (U.S.)
• 3 Science Channel (Television network)
• 3 Tyson, Neil deGrasse
• 2 A & E Home Video (Firm)
• 2 Amdahl, Eric
• 2 Anglia Television
• 2 BBC Worldwide Ltd
• 2 Bafaloukos, Ted
• 2 Bailey, John, 1942 August 10-
• 2 Baynes, Jeff
• 2 Beemer, Rob

• 46 English
• 1 French

• 6 Outer space
• 3 Solar system
• 3 Universe
• 2 Great Britain
• 2 Milky Way
• 1 California
• 1 Earth (Planet)
• 1 Jupiter (Planet)
• 1 Moon
• 1 Palomar, Mount
• 1 Saturn (Planet)
• 1 Sun
• 1 United States

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