The (a)   were the first to develop gunpowder.

rows and launched them with bows, creating early rockets. In 1232, with the Chinese and mongols at war with each other, these early rockets were used as (a)   of flying fire.

In England, (a)   improved forms of gunpowder, which increased the range of the rocket.

(a)   , an artillery expert with the British military, set out to design rockets for military use.

An Englishman, William Hale, developed a technique called (a)  

A Russian schoolteacher, (a)   , proposed the idea of space exploration by a rocket.

In 1926, (a)   achieved the first successful flight with a liquid-propellant rocket. It was fueled by liquid oxygen and gasoline.

He is known as the "Father of Modern Rocketry."

(a)  

The V-2 was built under the directorship of , (a)   , a German,who after the war headed up the Us rocket program.

The Explorer I was the first spacecraft to recongnize the Van Allen radiation belt around the Earth held in place by Earth’s magnetic field.

(a)  

In April of 1961, a Russian, named (a)   , became the first man to orbit Earth.

The Soviet Union launched the world’s first artificial satellite, (a)  

In February 1962, (a)   became the first American to orbit the Earth aboard the mercury capsule, Friendship 7

In October 1968, a saturn IB launched the first three-person mission, (a)  

On July 20, 1969, (a)   landed on the moon

(a)   became the first man to walk on the moon

The first US space station was called (a)  

The STS, commonly referred to as the (a)   , was used for transportation to space and back to Earth.

(a)   , aboard his mercury capsule, Freedom 7, became the first American in space.