Scientists find huge world of hidden galaxies, changing our understanding of the universe
Previously unknown webs of stars are more spectacular than our own, say researchers
By Andrew Griffin
https://www.independent.co.uk/life-s...-a9045951.html
Scientists have found a vast array of hidden galaxies, which together could change our understanding of how the universe works.
The mysterious galaxies, which were previously unknown to researchers, were discovered by a breakthrough new approach that allowed astronomers to
look more deeply than ever before into the universe.
The astronomers describe the new find as a treasure trove,
representing a huge set of galaxies. It could help solve some of the most deep and fundamental questions about the universe, including the mysteries of supermassive black holes and dark matter.
Some researchers had long thought that such hidden galaxies might be out in the universe, waiting to be found. But now they have finally been discovered and cosmologists will have to rethink their understanding of how the universe works.
Scientists got an
unprecedented look at the universe when the
Hubble Space Telescope was sent into space, and began looking around.
But it could not see some of the most fundamental parts of what surrounds us.
The new research allowed scientists to tie together a variety of different observatories and use them to
look more deeply than ever before and see the huge set of galaxies.
"This is the first time that such a large population of massive galaxies was confirmed during the first two billion years of the 13.7-billion-year life of the universe," said Tao Wang, from the University of Tokyo.
"These were previously invisible to us.
"This finding contravenes current models for that period of cosmic evolution and will help to add some details, which have been missing until now."
If you were able to see the galaxies themselves, they would be far more of a spectacle even than our own Milky Way.
"For one thing, the night sky would appear far more majestic," said Dr Wang, comparing the newly discovered part of the universe with our own.
"The greater density of stars means there would be many more stars close by appearing larger and brighter.
"But conversely, the large amount of dust means farther-away stars would be far less visible, so the background to these bright close stars might be a vast dark void."
But from Earth, the 39 galaxies are so difficult to see because they are so faint. Though they are the largest of their kind to be found, the light that reaches Earth is reduced and has been stretched because it has taken so long to travel to us.
"The light from these galaxies is very faint with long wavelengths invisible to our eyes and undetectable by Hubble," said Kotaro Koh, who worked on the new study published in
Nature....