An international research team led by Tsuyoshi Tokuoka, a graduate student at Waseda University in Japan, has observed signs of rotation in a galaxy, which existed in the early universe, only 500 million years after the Big Bang. This galaxy is by far the earliest galaxy with a signature of galaxy rotation. Its rotational speed is only 50 kilometers per second, compared to 220 kilometers per second for the Milky Way, indicating that the galaxy is still at an initial stage of developing a rotational motion. This finding would lead to a better understanding of the galaxy formation in the early universe.

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