The universe is surrounded by puzzles.
And a team of astronomers from the Niels Bohr Institute at the University of Copenhagen spotted two galaxies 29 billion light years from Earth using the giant Atacama Large Milimeter Array (ALMA) in Chile Atacama Desert.
These galaxies were previously invisible to the optical lens of the Hubble Space Telescope & appeared behind a thick layer of cosmic dust, thanks to technology that combines light from 66 antennae to generate a high-resolution image of the sky & can capture radio waves from darkest depths of the universe.
Unveiling The Secret Of Universe
Astronomers were studying a collection of extremely distant galaxies that had previously been discovered using the Hubble Space Telescope. “And then we noticed that two of them had a neighbor that we weren’t expecting at all,” said associate Professor Pascal Oesch of the Cosmic Dawn Center at the Niels Bohr Institute said in a press release. “As these two nearby galaxies are surrounded by dust, some of their light is blocked, making them invisible to Hubble.
The 2 invisible galaxies are now called REBELS122 and REBELS292, and their light has traveled for about 13 billion years to reach us and, due to the expansion of the universe, they are now 29 billion light years away.
The latest findings indicate that the early cosmos contains many more galaxies than previously thought. They are simply hidden under the dust consisting of tiny particles and can now be detected thanks to the exceptional sensitivity of the ALMA telescope and the method of the researchers. According to the researchers, between 10% & 20% of these early galaxies could still be obscured by veils of cosmic dust. These numbers are based on comparing these galaxies with previously identified sources in the early cosmos some 13 billion years ago.
“Our discovery shows that up to one in five of the earliest galaxies may have disappeared from our star chart. Before we can begin to understand when and how galaxies formed in the Universe, we need proper accounting.”, explained Pascal Oesch. Fortunately, NASA, ESA & the Canadian Space Agency have built a new telescope called the James Webb Space Telescope to help with this mission, and the telescope will be able to see much further into the universe thanks to its strength & technology improved. .
However, the James Webb Space Telescope has been plagued by delays and cost increases, and more recently a incident with a clamp band has again delayed the telescope’s launch. Following the incident, NASA reported that the launch preparation date was postponed to December 22 at the earliest. Hopefully this will be the last of the delays the telescope will encounter on its journey, as it has so many discoveries to make.