-
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.
-
The Greek astronomer Aristarchus of Samos suggested that the Earth revolved around the Sun.
-
The Greek astronomer Hiparchu classified the stars according to their apparent brightness.
-
Ptolemy suggested an geocentric astronimic model.Acording to him,the Sun,the moon and the other planets all revolved around the Sun.
-
Tyco Brahe carried out very detailed observation of the planets.Kepler deduced his famous planetary laws following Brahe´s observation.
-
Thanks to the spectroscope,an apparatus which allows us to identify substances in the stars.
-
Copernicus published his heliocentric model according to which the planets revolved around the Sun
-
Galileo used a telescope to observe for the first time the night sky.This was the birth of modern astronomy.
-
Isaac Newton built the first telescope with mirrors instead of lenses
-
Newton published his book The principles of Natural Phisolophy in which he explained the laws govering the movement of the planets.
-
Edmund Halley explained Newton´s laws and predicted the return of the comet(which was to carry his name) in 1758.
-
W.Herschell discovered the planet Uranus.
-
F.W.Bessel measured the distance from a star for the first time using geometric methods.This,in turn,definitively proved the heliocentric ideas.
-
The work carried out by Adams,Galle and Leverrier to dicover Neptune.
-
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.
-
C.Tomaugh discovered the planet Pluto
-
The discovery of the first extra-solar planets.
