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    • How are stars formed?
    • How were galaxies formed?
    • The expansion of the universe
    • Maths in the solar system: calculating scales
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    • Our cosmic calendar for the school year 2020/2021
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    • Types of movements in the air (hovercraft)
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    • C3 - Measurements: memories of the LTT in Portugal
    • C4 - The Solar System Exploration: memories of the LTT in Italy
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    • How did it all start?
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    • The transit of Mercury
    • European Day of Languages in Poland
    • International Observe the Moon Night
    • Nobel Prize 2019 in Physics for an astrophysicist and astronomers!

The expansion of the universe

  • The universe has been expanding since the Big Bang. It means that galaxies recede from one another. In order to understand how they move, we made this easy experiment (the balloon is the universe and the dots symbolize galaxies):

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