miércoles, 9 de octubre de 2013

Theories about the Universe


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.

18 comentarios:

  1. Copernic proposed the heliocentric model.
    The 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.

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    Respuestas
    1. Marvellous!!!! Of course, they are the main statements proposed by Copernicus.
      Thank you very much.

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  2. Sandra Rodríguez García 1º ESO B10 de octubre de 2013, 9:24

    1. do not know 2. are of the moon

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  3. Mónica Rodríguez 1º B14 de octubre de 2013, 12:04

    1. Greek
    2. 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.

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  4. Brilliant. You have explained very well the heliocentric model !!!
    I would like to make you a question. How Greeks could know which object is nearer from the Earth, the Moon or the Sun?

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    Respuestas
    1. Mónica Rodríguez 1º B15 de octubre de 2013, 9:14

      Because of the proximity of the stars and planets

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    2. ANDREA HERNÁ´DEZ PALOMINO19 de octubre de 2014, 10:14

      Is the Sun because is proximity of the planets.

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  5. pablo gallegos urendez10 de octubre de 2014, 7:50

    my constelation is tauro because is bery beutiful

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  6. mi constelacion es escorpion.

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  7. Naiara Bouza García11 de octubre de 2014, 3:33

    My 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.
    and also I want because I always liked gragons and snakes.

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  8. lucia gonzalez moles14 de octubre de 2014, 14:01

    My constellation is cignus
    Cignus 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

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  9. lucia gonzalez moles14 de octubre de 2014, 14:12

    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

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  10. Carmen de la torre montañés15 de octubre de 2014, 7:43

    My 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.

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  11. Javier Perea Guijarro15 de octubre de 2014, 8:54

    My constellation is Hercules.I choose this constellation because HERCULES is a demigod in the Roman mythology.

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  12. Maria Medina Del Moral15 de octubre de 2014, 10:35

    My 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

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  13. saramb0801@gmail.com15 de octubre de 2014, 15:47

    Is 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

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  14. My 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.

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  15. Carmen de la torre montañés14 de noviembre de 2014, 9:59

    What is the questions?

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