There are many nature satellites in the solar system. However, there were no artificals until the mid-20th century. What was the nameof the first artificial satellite sent to space? What prevents a satellite from falling out of control and crashing into the earth? What stops a satellite from colliding with another satellite in space?

Satelites : Space Encyclopedia

SKU: 9789386316585
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    Om Books Editorial Team
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    Om Books International
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