-
An astronomer by the name of Nicolaus Copernicus published a book containing the first theories on a heliocentric system
-
Hans Lippershey makes the refracting telescope
-
Galileo Galilei discovers craters on the moon,4 satellites of Jupiter,and spots on the sun thus debunking the myth that was the geocentric system
-
Isaac Newton publishes his first copy of the book Philosophiae Naturalis Principia Mathematica,explaining Kepler's laws of planetary motion
-
An amateur at the time,William Herschel discovers Uranus mistaking it for a comet at first
-
Johann Gottfried Galle while searching in in a position given to him by Urbain Le Verrier and finds Neptune
-
Konstantin Tsiolkovsky publish articles saying that the rocket will work in the vacuums of space,giving hope for possibility of space flight
-
-
Edwin Hubble was the first to discover other galaxies and track their movement
-
Robert Goddard's rocket which is the the first to use liquid fuel,is demonstrated and is shown to work in a vacuum,and breaks the sound barrier
-
The US launches Explorer 1 into space
-
NASA is created to catch up with Soviet space technologies and absorbs the NACA which was founded in 1915
-
Apollo 8 manages to make it past Earth's gravitational pull,orbit the moon,and make it back safely
-
IAU changed the definition of a planet,making another class called dwarf planets were also made.Pluto,Ceres,and Eris were changed to dwarf planets.
-
-
Juno the satellite was launched in 2011 and reaches Saturn in 5 years