Скачать или смотреть Cosmology: A Big Bang and the Beginning of the Universe

If we want to learn about the universe, we have to start at the very beginning. How and when did the universe begin? Is it even possible to know about such things? Yes, it is! That's what cosmology is all about, the origin and development of the universe. Let's go over what astronomers know today, and also mention what we don't know yet!

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