Sputnik Crisis: The period of public fear and anxiety in Western nations due to the launch of Sputnik 1, marking the Soviets' entry into space.
Moon Landing: The event where Apollo 11, a NASA mission, successfully landed two astronauts on the moon's surface in July 1969. This marked a significant victory for US in the Space Race.
Intercontinental Ballistic Missile (ICBM): A missile with a minimum range of 5,500 kilometers primarily designed for nuclear weapons delivery. Development of ICBMs was crucial during Space Race as it demonstrated technological superiority.