Astronomers have discovered one of the oldest Galaxy formed just after just 1.5 billion years after the Big Bang. Scientists named this 12.3 billion old galaxies ‘Galaxy DLA0817g (nicknamed Wolfe Disk).’ It is spinning at 170 miles (272 kilometers) per second, similar to our Milky Way.
Previous studies suggest that most galaxies form gradually and reached their large much later in their development. But a new discovery revealed that Wolfe Disk grew to 70 billion mass when the universe was just 10% of its current age. Astronomers said most distant Galaxies formed around 6 billion years ago but Wolfe Disk indicates that some other forces might be dominated in the formation of the Galaxy. Maybe it created from the accretion of cold gas.
“We think the Wolfe Disk has grown primarily through the steady accretion of cold gas,” said J. Xavier Prochaska, of the University of California, Santa Cruz, and co-author of the paper. “It must be one of the most productive disk galaxies in the early universe.”
Scientists used the Atacama Large Millimeter/submillimeter Array (ALMA) telescope to make the discovery. The team behind the discovery believes that it is a high probability that there will be more such galaxies like Wolfe Disc. The discovery gives some clues on how early galaxies formed.
Image Credit: NRAO/AUI/NSF, S. Dagnello