The mystery of when the first bright stars began to be revealed, the secrets of the universe were revealed: Okezone News

JAKARTA – Astronomers have finally found the answer to the question of when the stars began to shine.

The phenomenon, also known as the “cosmic dawn,” is said to have occurred between 250 and 350 million years after the Big Bang.

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The analysis indicates that the first galaxies in the universe emit a fairly strong light, which can be seen with NASA’s James Webb space telescope, which is scheduled to launch this year.

The study of exactly when the stars begin to shine was the focus of research by an expert at University College London, England, Richard Ellis, published in the scientific journal The Monthly Notices of the Royal Astronomical Society.

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Speaking to BBC News, Professor Ellis explained that an important aspect of the study is to go back, as far as possible, to see the first generation of stars and galaxies.

“And now, we have the first compelling evidence of when our universe began to shine,” Ellis said.

Ellis’ team analyzed the six most distant galaxies. These galaxies are so far away that their appearance when viewed with the world’s most powerful telescope is no more than a few pixels on a computer screen.

They are also among the first galaxies in the universe. After determining their age, the team calculated the beginning of the cosmic dawn, which is when the first stars formed.

Peering into the past

Dr. Nicolas Laporte, of the Kavli Institute of Astronomy in Cambridge, England, was to lead the analysis.

“This is one of the most important questions in modern cosmology. For the first time we could predict when this important moment in the history of the universe happened,” said Laporte.

He said that finding answers to these questions is like a “dream come true”.

“It’s amazing to have data that shows light particles have passed through our universe for more than 13 billion years and then to (our) telescopes. One of the advantages of being an astrophysicist is the ability to ‘travel in time’ and see the past. . Then, “Laporte explained.

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The universe was formed 13.8 billion years ago through the Big Bang.

And then our universe experienced darkness. According to a new study, 250 million to 350 million years after the Big Bang, the first stars appeared, together bringing light.

What is important in this study is that analysis by experts indicates that the light from these first galaxies was strong enough to be captured by the James Webb Space Telescope.

If so, astronomers might still be able to witness key moments in the evolution of the universe first.

This possibility was welcomed by the astronomer of Scotland, Professor Catherine Heymans.

“I think it is fantastic. Imagine, people, a small civilization that lived on planet Earth, could build a space telescope and use this telescope to look at what happened a few hundred million years after the Big Bang, “Heymans said.

Researchers analyzed starlight in the galaxy using the Hubble and Spitzer space telescopes.

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Galactic distances are measured using telescopes on Earth, namely the Atacama Large Millimeter Array (Alma), the Very Large Telescope (VLT), and the Gemini South Telescope, all located in Chile.

Experts are also using the twin Keck telescopes in Hawaii.

Based on an analysis of the ages of galaxies and when they began to form, the team calculated when the first stars were born in the universe.

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