• Question: how did the solar system begin

    Asked by reddude3033 to Angus, Christian, Hannah, Laura, Simon on 21 Jun 2013.
    • Photo: Simon Holyoake

      Simon Holyoake answered on 21 Jun 2013:

      the solar system began after the first stars exploded in giant supernovae, scattering heavier elements around, when some of this material began to condense into a star which formed our sun, it pulled other material in, forming something called an Accretion disk, this is a large, roughly circular disk of debris, as gravity again took hold, chunks of matter clumped together, eventually forming planets, moons and asteroids

    • Photo: Laura Roberts Artal

      Laura Roberts Artal answered on 21 Jun 2013:

      The main theory about how the Universe formed is called The Big Ban Theory.
      We think the Universe started forming 13.798 billion years ago as a really small bubble that was hot and dense. It then exploded and grew to be bigger than a galaxy and kept on growing. It is still growing today. The explosion lead things to cool down a bit and this meant it was possible for particles of matter and antimatter to start forming. Protons and neutrons, the building blocks of atoms, formed. It took three minutes for the temperature to lower enough for the neutrons and protons to come together and capture electrons to form atoms of helium and hydrogen. The Universe then filled with clouds of hydrogen and helium.
      Scientist don’t have any direct evidence for the Big Bang, they can just see a faint glow in space that supports this theory.
      As millions of years passed, the dense areas pulled in material because they had more gravity. Finally, about 100 million years after the Big Bang, the gas became hot and dense enough for the first stars to form.

      Take a look at this website, it has lots of information about the Universe. http://www.esa.int/esaKIDSen/index.html

    • Photo: Christian Maerz

      Christian Maerz answered on 22 Jun 2013:

      Nothing to add 🙂

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