First Spiral Galaxy in Early Universe Stuns Astronomers

First Spiral Galaxy in Early Universe Stuns Astronomers

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Astronomers have spotted the earliest known spiral galaxy, dating to just three billion years after the Big Bang. Theories of galaxy formation held that the Universe was still too chaotic a place to allow such a perfectly formed or “grand-design” spiral to form. It should take far longer for gravity to bring matter into thin, neat discs. But a team reporting in Nature says the galaxy BX442 got the gravitational “kick” it needed to form a spiral from a smaller “dwarf galaxy” orbiting it.

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