-
13.8 billions of years ago, scientists believe that is when all te universe started.
-
The birth of science because of the spectroscope
-
The greek astronomer Aristarchus of Samos suggested that the earth revolved around the sun.
-
The greek astronomer Hiparchus classified the stars depending on its shiness
-
Ptolemy suggested a geocentric astronomic model. With the Sun, the moon, and the five known planets
-
The first time that Galileo Galiley watch the stars on a telescope
-
Isaac Newton built the first telescope with mirrors
-
Newton publishes his book called: The Principles of Natural Philosophy, which he explained the laws of the movements of the planets
-
Edmund Halley explained Newton´s Laws
-
F.W. Bessel measured the distance from a star for the first time
-
The Discovery of Neptune
-
Proved that some nevulas are actually galaxies
-
The discovery of the planet Pluto
-
The discovery of extra -solar planets
