Hubble constant

how fast the Universe is expanding The Mystery Behind the Hubble Constant

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How fast the Universe is expanding? Right now, about 73 kilometers per second per megaparsec. But this isn’t fixed. It was slower in the past. Now it’s speeding up. And depending on how we measure it, we get different numbers.

Introduction: Asking the Big Question – How Fast Is the Universe Expanding? Space lovers constantly ask: How fast the Universe is expanding? Was it an explosion? Is there a center? What’s it expanding into? The Big Bang wasn’t an explosion in space—it was the expansion of space itself. From a dense, hot origin, space has … Read more