A spiral galaxy dating back to just 3 billion years after the Big Bang has been photographed by Hubble.
The discovery is particularly interesting because it appears to be a spiral galaxy at a time when the universe was considered too chaotic for such a thing to have formed. Astronomers now believe that an orbiting dwarf galaxy may have helped provide the necessary gravitational 'kick' to enable it to form in to a spiral.
"Even though we see some discs existing at that time, they're very thick and puffy, whereas the Milky Way has an... amount of random motion only about a tenth or so the amount of ordered rotation, giving rise to a very thin disc," said study author David Law.
"Astronomers have spotted the earliest known spiral galaxy, dating to just three billion years after the Big Bang."
View: Full article | Source: BBC News
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