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English
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OTHER EPISODES IN THIS PODCAST

A brief description of the Local Group of galaxies which contains the Milky Way, the Andromeda galaxy, and dozens of dwarf galaxies all gravitationally bound to each other.
A brief description of what will happen if the universe stops expanding and collapses back on itself - this is known as the Big Crunch.
A brief description of what scientists mean when they say we "know" something.
A brief description of the structure of atoms - how they are mostly empty space - and why the everyday objects you use don't collapse and fall in on themselves.
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