
Q2343-BX442: A false color composite image of galaxy BX442 generated with data from NASA’s Hubble Space Telescope and the W.M. Keck Observatory in Hawaii. (Credit: David Law/Dunlap Institute for Astronomy & Astrophysics)
A team of astronomers have reported the discovery of the oldest spiral galaxy known so far.
What makes this discovery interesting is that this grand-design spiral galaxy already existed only 3 billion years after the Big Bang when the universe was too hot and chaotic to allow such a regular structure to survive long enough to be seen.
Usually, galaxies born this early after the Big Bang look clumpy and irregular. When the astronomers saw the regular spiral arms of this unusual galaxy, they studied it further with the Keck Observatory in Hawai’i. The results confirmed that grand-design spiral galaxies existed at a very early age of the universe.




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