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Distant Galaxies | Hubble Images 4K | Episode 4
In this episode we mainly have a look at various types of galaxies, some of which are very, very far away. Donald Trump ...
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One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate.’
In the century since Hubble’s pioneering work, astronomers like me have learned that the universe is vast and contains trillions of galaxies ... were two different types of Cepheid variables.