Is the universe expanding?

Is the universe expanding?In 1929, the American astronomer Edwin Hubble discovered that the galaxies are moving apart from each other at high speed. The Universe is expanding like a balloon being inflated. The further apart the galaxies are, the faster they move. For instance, a galaxy 10 million light years away gets 300 km (187 miles) further from us every second. A galaxy ten times further off moves ten times faster, and so on.

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