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20,000 BCE
Big Bang
Great pop or big bang theory is a scientific model that tries to explain the origin of the universe and its further development from a temporary space singularity.A molecule of hydrogen and a molecule of helium exploded and the result were the stars. -
3 BCE
Suggestion of traslation
The Greek astronomer Aristarchus of Samos suggested that the Earth revolved around the Sun. -
2 BCE
Classification of stars
The Greek astronomer Hiparchu classified the stars according to their apparent brightness. -
2
Geocentric idea
Ptolemy suggested an geocentric astronimic model.Acording to him,the Sun,the moon and the other planets all revolved around the Sun. -
16
Observation and laws of the planets
Tyco Brahe carried out very detailed observation of the planets.Kepler deduced his famous planetary laws following Brahe´s observation. -
19
The birth of the science Astrophisics
Thanks to the spectroscope,an apparatus which allows us to identify substances in the stars. -
Sep 13, 1543
Heliocentric idea
Copernicus published his heliocentric model according to which the planets revolved around the Sun -
Galileo observed the night sky
Galileo used a telescope to observe for the first time the night sky.This was the birth of modern astronomy. -
The first telescope
Isaac Newton built the first telescope with mirrors instead of lenses -
Newton´s book
Newton published his book The principles of Natural Phisolophy in which he explained the laws govering the movement of the planets. -
Edmund explanation of Newton´s laws
Edmund Halley explained Newton´s laws and predicted the return of the comet(which was to carry his name) in 1758. -
Uranus
W.Herschell discovered the planet Uranus. -
Distance of a star
F.W.Bessel measured the distance from a star for the first time using geometric methods.This,in turn,definitively proved the heliocentric ideas. -
Descovery of Neptune
The work carried out by Adams,Galle and Leverrier to dicover Neptune. -
E.P.Hubble descoverment
E.P.Hubble proved that some of the nebulas seen in the sky are in fact independent galaxies.He then discoveres that the galaxies move away from each other. -
Pluto
C.Tomaugh discovered the planet Pluto -
Extra-solar planets
The discovery of the first extra-solar planets.
