Long time ago, ancient Greek placed the Earth at the center
of the Universe. This theory was supported by two observations. The first one
was that the stars, the Sun, planets and stars appear to revolve around the
Earth each day, making our planet the center of that system. The second one was
that the Earth does not seem to move for people.
They put the Moon and planets on concentric crystalline
spheres that revolved at different velocities around the Earth. There was also
a big sphere with all the fixed stars.
The order of these bodies was: Moon, Mercury, Venus, Sun,
Mars, Jupiter, Saturn and fixed stars. Today we know that there are more
planets, as Uranus and Neptune, but Greeks couldn’t observe them because they
are too far from us.
But soon, as observations improved, this simple model could
not explain the movement of the planets: they usually moved in one direction,
but sometimes they seemed to go back in the sky.
In the Sixteenth Century, a new theory called heliocentrism offered new explanations. Can you tell us who discovered it? What are the most important statements of that theory? I hope your answers.
In the Sixteenth Century, a new theory called heliocentrism offered new explanations. Can you tell us who discovered it? What are the most important statements of that theory? I hope your answers.
Copernic proposed the heliocentric model.
ResponderEliminarThe more importants statements are:
1. The Sun is in the centre of the Solar System.
2. The Earth revolves around the Sun with the other planets and the Moon.
3. The Earth rotates on itself.
4. The sphere of stars surrounding this system does not move.
Marvellous!!!! Of course, they are the main statements proposed by Copernicus.
EliminarThank you very much.
1. do not know 2. are of the moon
ResponderEliminar1. Greek
ResponderEliminar2. This theory was supported by two observations. The first one was that the stars, the Sun, planets and stars appear to revolve around the Earth each day, making our planet the center of that system. The second one was that the Earth does not seem to move for people.
They put the Moon and planets on concentric crystalline spheres that revolved at different velocities around the Earth. There was also a big sphere with all the fixed stars.
The order of these bodies was: Moon, Mercury, Venus, Sun, Mars, Jupiter, Saturn and fixed stars. Today we know that there are more planets, as Uranus and Neptune, but Greeks couldn’t observe them because they are too far from us.
3.
Brilliant. You have explained very well the heliocentric model !!!
ResponderEliminarI would like to make you a question. How Greeks could know which object is nearer from the Earth, the Moon or the Sun?
Because of the proximity of the stars and planets
EliminarIs the Sun because is proximity of the planets.
Eliminarmy constelation is tauro because is bery beutiful
ResponderEliminarmi constelacion es escorpion.
ResponderEliminarMy constellation is Draco because it has enough mythology Greek and other is a dragon with a hundred heads, a snake that was sent to Athena by giants and that this in turn I cast to the sky where and it been hooked or how Zeus adopted to escape their father Cronus.
ResponderEliminarand also I want because I always liked gragons and snakes.
My constellation is cignus
ResponderEliminarCignus is a nothern constellation hemiferio that crosses the milky way.the main stars de la diprosicion makes it known some times eat the northern cross, in contrast to the heavenly constellation of the southean croos
Cignus is a nothern constellation hemiferioo that crosses the Milky way.the main stars de la diprosicion makes it known some times eat the northern cross, in contrast to the heavenly constellation of the southean croos
ResponderEliminarMy constellation is Aquarius, because is my favourite constellation and is my horoscope. She is very beautiful because a man appeares with a pitcher of water.
ResponderEliminarMy constellation is Hercules.I choose this constellation because HERCULES is a demigod in the Roman mythology.
ResponderEliminarMy constellation is ARIES. I choose this photo because the view is beautifull.Contains two red dwarfs - Star of Teegarden and TZ Arietis - wich are among the 40 closet star to the Solar System
ResponderEliminarIs my favourite constellation is Lyra is because Ilove the music and play the piano madethe Lyra I see a little weird because I do not see how Lyra I see a triangle
ResponderEliminarMy name is luis. My constellatión is Geminis .Ihave chosen this constellatión because it´s a very beautiful constellation. The constellation contains 85 stars visible to observation on Earth without a telescope.
ResponderEliminarWhat is the questions?
ResponderEliminar