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Euclid space telescope captures dazzling new images of the cosmos: "Never seen anything like it"

Europe's Euclid space telescope launched by SpaceX
Europe's Euclid space telescope launched by SpaceX 00:21

A mind-boggling number of shining galaxies, a purple and orange star nursery and a spiral galaxy similar to our Milky Way: new images were revealed from Europe's Euclid space telescope on Thursday.

It is the second set of images released by the European Space Agency since Euclid launched last year on the first-ever mission to investigate the mysteries of dark matter and dark energy.

"The never-before-seen images demonstrate Euclid's ability to unravel the secrets of the cosmos and enable scientists to hunt for rogue planets, use lensed galaxies to study mysterious matter, and explore the evolution of the universe," the European Space Agency said in a statement.

Scientific data from Euclid was also published for the first time in the six-year mission, which aims to use its wide view to chart two billion galaxies across a third of the sky.

Euclid project scientist Rene Laureijs told AFP that he was "personally most excited" about the image of a massive cluster of galaxies called Abell 2390. The image of the cluster, which is 2.7 billion light years away from Earth, encompasses more than 50,000 galaxies.

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Abell 2390. ESA

Just one galaxy -- such as our own -- can be home to hundreds of billions or even trillions of stars, each of which could be bigger than the Sun.

In Abell 2390, Euclid was able to detect the faint light of "orphan stars" drifting between galaxy clusters, said Jean-Charles Cuillandre, a French scientist working on Euclid.

These stars are ejected from the galaxies, "creating a kind of cloud which surrounds the entire cluster," Cuillandre told AFP.

According to astronomers, this strange phenomenon points towards the presence of dark matter between the galaxies.

Dark matter and dark energy are thought to make up 95 percent of the universe -- but we know almost nothing about them.

Euclid also captured the deepest-ever image of the Messier 78, a nursery where stars are born 1,300 light years from Earth in the Orion constellation.

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Messier 78, a vibrant star nursery enveloped in interstellar dust. ESA

Stars are still in the process of forming in the bluish centre of the image. After gestating for millions of years, they emerge from the purple and orange clouds at the bottom of the image. "Bright things are trying to come out," said Cuillandre.

Laureijs emphasised that "only Euclid can show this in one shot."

That is because Euclid has a very wide field view, in contrast to far-seeing fellow space telescope the James Webb, its neighbor at a stable hovering spot 9.3 million miles from Earth.

Another image, of the huge galaxy cluster Abell 2764, depicts a black expanse in which one yellow star stands out.

Cuillandre admitted this was the result of an error in pointing the telescope. But he said the image demonstrated "Euclid's absolutely unique ability to concentrate light," because it was still able to pick up very faint objects next to the bright star.

Euclid's image of the young Dorado cluster contained a surprise. Though the cluster was already well studied, Euclid discovered a never-before-seen dwarf galaxy, the scientists said.

"I've never seen anything like it," Cuillandre said.

In the fifth new image, the spiral galaxy NGC 6744 -- which bears a striking resemblance to the Milky Way -- fans out against a backdrop of shining stars.

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Spiral galaxy NGC 6744 ESA

It is still early days for the mission, and the five new images were captured in just one day.

In the years ahead, scientists plan to sift through Euclid's data in the hopes of spotting all manner of celestial bodies such as "rogue" planets, which float freely through the universe unconnected to a star.

But researchers have already been analysing Euclid's first batch of images, which were released in November.

In one of 10 pre-print studies published on Thursday, scientists looked into the faint light from orphan stars in the Perseus galaxy cluster.

These lost stars "are now trapped in the gravity of the dark matter," Laureijs said.

This remains only "indirect detection of dark matter," he emphasized, adding that it was too early "to say something about dark energy."

An image released last year showed a spectacular wide-angle view of Perseus, revealing at least 1,000 gravitationally-bound galaxies with another 100,000 or so sprinkled across the more distant background — many of them never before seen.

The mission has not been entirely smooth sailing.

In March, a delicate operation successfully melted a thin layer that had been slowing clouding the telescope's sight by warming one of the telescope's mirrors.

There are signs that the ice is building up again, Laureijs said, adding that the team has time to investigate what to do next.

Launched from Cape Canaveral on July 1, 2023 atop a SpaceX Falcon 9 rocket, the $1.5 billion Euclid is stationed about a million miles from Earth on the far side of the moon's orbit.

Over the course of its six-year mission, the observatory will image the entire sky around the Milky Way, monitoring galaxies and galaxy clusters dating back 10 billion years.

"The images and associated science findings are impressively diverse in terms of the objects and distances observed. They include a variety of science applications, and yet represent a mere 24 hours of observations. They give just a hint of what Euclid can do," Valeria Pettorino, ESA's Euclid Project Scientist, said in a statement Thursday. "We are looking forward to six more years of data to come!"

William Harwood contributed to this report.

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