A. Apollo 11
B. Vostok 1
C. Sputnik 1
D. Explorer 1
Answer: Sputnik 1
A. Apollo 11
B. Vostok 1
C. Sputnik 1
D. Explorer 1
Answer: Sputnik 1
Additional Information: Sputnik 1 was the first artificial satellite launched by the Soviet Union on October 4, 1957.
Subjects: Science and Technology, General Knowledge