Multiple choice general knowledge

What is the first artificial satellite to orbit Earth?

  1. Sputnik 1

  2. Discoverer 1

  3. Vanguard 1

  4. Explorer 1
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A Correct answer
Explanation

Sputnik 1, launched by the Soviet Union on October 4, 1957, was the first artificial satellite to successfully orbit Earth. Explorer 1 was the first US satellite (launched in 1958), while Vanguard 1 launched later in 1958, and Discoverer 1 was a reconnaissance satellite.

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