Galileo: 400 Years of the Telescope
58:31
Our Place in the Universe: Cosmology from Ancient Greece to Today
1:05:06
Shedding Light on Dark Matter
1:02:47
Magnifying the Universe
1:42:58
House Science & National Labs Caucus: Neil deGrasse Tyson
59:44
Beyond Hubble: A New Era of Astronomy with the James Webb Space Telescope
2:07:50
A Celebration of Carl Sagan
1:15:17
Luís de Camões at the Library of Congress
53:00