Nicolaus Copernicus publishes On the Revolutions of the Heavenly Spheres
Copurnicus published this ideas about planets orbiting the sun in in a heliocentric way. Before Copernicus, many people like Ptolemy and Aristotle thought the sun orbited the earth in a geocentric way. But Galileo also believed in heliocentrism
Robert Goddard launches the first liquid fueled rocket
Nazi Germany Attacks Britain with V2 Ballistic Rockets
Soviets Launch Sputnik, Earth's first articial satellite
US Orbits its First Artificial Satellite, Explorer
First Weather Satellite, TIROS, is Launched by the US
Cosmonaut Yuri Gagarin is the First Person in Space
US Astronaut John Glenn Makes Makes first Orbital Mission Around the Earth
Apollo 11 Mission to the Moon is the First to Land On the Moon
Soviet Union's Robot Moon Rover 1 is Launched
Pioneer 10 Space Probe is Launched
Pioneer 10 reaches Jupiter. It is first space probe to reach Outer Planets
