This is LAGEOS. Since 1976, this perfect disco sphere has been orbiting Earth carrying 426 cube corner reflectors made of fused silica glass—except four, made of germanium. It also contains a coded message, designed by Dr. Carl Sagan. More » |
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This is LAGEOS. Since 1976, this perfect disco sphere has been orbiting Earth carrying 426 cube corner reflectors made of fused silica glass—except four, made of germanium. It also contains a coded message, designed by Dr. Carl Sagan. More » |