SOLAR SYSTEM

Detailed explanation-1: -The Apollo program was the name of NASA’s project to land humans on the moon in the 1960s and early 1970s. With the success of Apollo 11 in 1969, which put astronauts on the lunar surface for the first time in history, the U.S. was able to declare victory in the space race against the Soviet Union during the Cold War.

Detailed explanation-2: -4 October 1957: The USSR successfully launches Sputnik 1, the first Earth-orbiting satellite in history. 3 November 1957: The USSR successfully launches Sputnik 2, carrying a dog named Laika into space.

Detailed explanation-3: -Apollo achieved the first crewed lunar landing on the Apollo 11 mission, when Neil Armstrong and Buzz Aldrin landed their LM Eagle in the Sea of Tranquility and walked on the lunar surface, while Michael Collins remained in lunar orbit in the CSM Columbia, and all three landed safely on Earth on July 24, 1969.

Detailed explanation-4: -By landing on the moon, the United States effectively “won” the space race that had begun with Sputnik’s launch in 1957. For their part, the Soviets made four failed attempts to launch a lunar landing craft between 1969 and 1972, including a spectacular launch-pad explosion in July 1969.