Telescopes, Resolution and Angular Size
24:46
The Core of the Sun
16:01
Telescopes: Focal ratio, plane and telescope types
40:01
Neutron Stars
35:42
The Hertzsprung-Russell Diagram
24:53
The Solar Neutrino Problem
29:30
Proper Motion and Parallax
22:59
O Paradoxo da Cúpula: Uma Brecha nas Leis de Newton
32:10