Nasa’s James Webb Telescope Reveals Millions of Galaxies

There were 10 times more galaxies like our own Milky Way in the early universe than previously thought.

This cosmic view is from one of the first studies of images taken by NASA’s new James Webb Space Telescope.

One of its authors, Professor Christopher Conselis of the University of Manchester, UK, said that Webb could “get close to the early universe.”

This provided information about objects in space that “we knew existed but didn’t understand how or when they formed.”

Disk galaxies today dominate the “galactic population,” the researcher explained.

“Our own galaxy is a disk, Andromeda (our closest neighbor, which is 2.5 million light-years from Earth) is a disk.
“Three-quarters of nearby galaxies are disks, but they were thought to have formed at the end of the universe’s evolution,” he told BBC News

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That was before the James Webb Space Telescope gave astronomers a view so far back in time.

The study, which has been published on a preprint server, meaning it has yet to be peer reviewed by other scientists in the field, used the first image released from the telescope.

This image shows a foreground cluster of galaxies called SMACS 0723. The gravity of this great mass of objects has magnified the light of galaxies in the background, in distant Universe, making them visible for the first time. Some of these galaxies existed a mere 600 million years after the Big Bang.

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This was before the James Webb Space Telescope allowed astronomers to look so far into the past.

The study, which was published on the preprint server, meaning it has not yet been reviewed by other scientists in the field, used the first image released by the telescope.

This image shows a foreground cluster of galaxies called SMACS 0723. The gravity of this large mass of objects has increased light from background galaxies in the distant universe, making them visible for the first time. Some of these galaxies existed as little as 600 million years after the Big Bang.
Webb takes incredible photos: “This could be the most important telescope in history.”
Webb, with his 6.5m wide golden mirror and ultra-sensitive infrared instruments, can determine their shape and count them.

“We knew that we would see something that Hubble did not see. But in this case, we see things differently,” said Professor Conselis, who will present some of his findings on Saturday, July 23 at the Bluedot Festival at Jodrell Bank in Cheshire. .

The universe is about 13.8 billion years old, so the images taken by JWST are glimpses of the processes that formed stars and planets long before our own appeared.

“These are the processes that we need to understand if we are to understand our origins,” said Professor Conselis.

“This could be the most important telescope in history,” he added. At least not since the time of Galileo.

James Webb is a joint project of the American, European and Canadian space agencies led by NASA.

James Webb