-
19 BCE
Key event
The birth os science Astrophysics -
16 BCE
Key event
Tyco Brahe carried out very detailed observation of the planet. Kepler deduced his famous planetary laws following his observations. -
4 BCE
key event
The Greek astronomer Aristarchus of Samos suggested that the Earth revolved aroun the Sun. -
2 BCE
key event
Hiparchus classified the stars according to their apparent brightness -
200
key event
Ptolemy suggested a geocentric astronomic model .
The Sun the moon and the five known planets all revolved around the Earth. -
Jan 1, 1543
key event
Copernicus published his heliocentric model , according to which the planets revolved around the Sun -
Key event
Galileo used a telescope for the first time. This was the birth of modern astronomy. -
Key event
Isaac Newton built the first telescope using mirrors instead of lenses. -
Key event
Newton published his book "The principles of natural Philosophy", which explained the laws of the planets -
Key event
Edmund Halley explained Newton`s laws and predicted comet (which carry his name) -
Key event
F.W. Bessel matured the distance from a star for the first time using geometric methods. -
Key event
The work by Adams, Galle and Leverrier lead to the discovery of Neptune -
Key event
E.P. Hubble proved that some of he nebulas seen in the sky are in fact independent galaxies -
Key event
Tombaugh discovered the planet Pluto -
Key event
The discovery of the first extra-solar planets