astronomy and planetary movements

astronomy in antiquity.

Jan 1, 1000

The curiosity of the ancients regarding the day and night, the sun, moon and stars led them to conclude that the heavenly bodies appear to move on a regular basis, which is useful for defining time and orientation. Astronomy solved the problems that troubled: America has not been found by the Spanish and the means of navigation were based on astronomy.

ptolomeo

Apr 23, 1100

Ptolemy's geocentric system was based on three basic considerations:

1. The earth is the motionless center of the universe.
2. All objects are moved around the earth.
3. The movement of the heavenly bodies, sun, moon, planets and fixed stars, are made uniform circular.

Tycho Brahe

Apr 23, 1580

From 1580 to 1597 the Danish astronomer Tycho Brahe observed the Sun, Moon and planets at the observatory located on an island near Copenhagen and later in Germany.

nicolas copernico

Apr 23, 1600

Heliocentric Theory
The history of astronomy took a drastic turn in the sixteenth century as a result of the contributions of the Polish astronomer nicolas copernico If Copernico had not investigated would think that we are the center of the universe.

Kepler's laws

Apr 23, 1610

First Law (1609): All planets move around the sun in elliptical orbits, with the Sun located at one focus. if it had not investigated Kleper times would know no rotation of the earth

moons of Jupiter

Apr 23, 1610

until 1610 after directing his telescope Galileo Galilei fifty increases when he discovered the four moons of Jupiter. are planetary bodies with radii (in kilometers) between 1,569 to 2,631 of Europe to Ganymede. Only 1,738 km Moon radius is larger than Europe, the rest are larger than Earth's moon, if they were spinning around the sun would be considered dwarf planets.

Isaac Newton

Apr 23, 1685

Isaac Newton (1643-1727) would set out his theory of universal gravitation in 1685 Gravedadla providing a natural explanation of Kepler's laws as a result of the interaction (attraction) quesufren gravitational bodies. if Newton had not investigated would know that things do not fall to the ground.

Comet Halley

Apr 23, 1705

Comet Halley was the first to be recognized as periodic, its orbit was calculated for the first time by the astronomer Edmund Halley in 1705. without these calculations on the comet's period we could not know that orbits the Sun once every 75-76 years on average