jan 1, 150 - Claudius Ptolemy proposes the "Ptolemaic system" which is one of the first models of the solar system. Note that it is wrong since it proposed that the Earth is the center of the solar system. Ptolemy also named many constellations whose names are still used to this day. (150)
Added to timeline:
Date:
jan 1, 150
Now
~ 1876 years ago