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| | Cat Castle, History of Space Exploration |
 | | The desire to explore the heavens is probably as old as humankind, but in the strictest sense, the history of space exploration begins very recently, with the launch of the first artificial satellite, Sputnik 1, which the Soviets sent into orbit in 1957. |
 | | On January 2, 1959, after two earlier failed missions, the USSR launched Luna 1, which was intended to hit the Moon. |
 | | Landsat 1 was equipped with cameras that recorded images not just of visible light but of other wavelengths in the electromagnetic spectrum (see Electromagnetic Radiation). |
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