2024-01-30 03:53:00
The James Webb Space Telescope releases new images. It is a collection of 19 spiral galaxies that are both beautiful and scientifically valuable.
On January 29th, NASA’s James Webb Space Telescope (JWST) A new set of pictures has been published. that shows in stunning detail 19 spiral galaxies located relatively close to our Milky Way. Provides new clues about star formation and the structure and evolution of galaxies.
The images were released by a team of scientists involved in a project called High Resolution Angular Physics in Nearby Galaxies (PHANGS), which operates at several major astronomical observatories.
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Of the 19 galaxies, the closest to us is NGC5068, which is about 15 million light-years from Earth, and the most distant galaxy is NGC1365, which is about 60 million light-years from Earth.
Spiral galaxies look like gigantic molluscs or spirals. It is a galaxy that is commonly found. Including our own Milky Way, which is one of the spiral galaxies.
Images of the 19 spiral galaxies from the Webb Near-Infrared Camera (NIRCam) and the Mid-Range Infrared Imager (MIRI) show approximately 100,000 star clusters and millions, if not billions, of stars.
Webb’s NIRCam captured millions of stars in these images. which glows in a blue tone Some stars are spread across spiral arms. But some stars are tightly grouped together into star clusters.
Data from MIRI highlighted the dust until it looked like it glowed. which shows us that Where is the dust around and between stars? It also highlights stars that are not yet fully formed. They remain enveloped in the gas and dust that nourishes their growth.
Janice Lee, astronomer at the Space Telescope Science Institute One of the PHANGS project scientists said: “Webb’s new images are extraordinary … They are astonishing even for researchers who have been studying these same galaxies for decades. Bubbles and fibers can be seen down to the smallest size ever seen. and tells the story of the star formation cycle.”
Thomas Williams, astronomer from Oxford University The team, who led the team’s data processing on the images, said: “This information is important. Because it gives us a new perspective on the earliest stages of star formation.”
He added: “Stars are born deep within dust clouds that completely block light at visible wavelengths … but these dust clouds appear brighter at Webb wavelengths. We don’t know much about this period. I don’t even know how long it will actually last. Therefore, this information is important for understanding how stars in our galaxy began.”
About half of spiral galaxies have a linear rod structure. similar to a gas rod which comes out of the center of the galaxy
Evidence also shows that The galaxy grows from the inside out. Star formation begins at the core of galaxies and spreads along their arms. and swirling away from the center The farther a star is from the galactic core, It is likely that the star is much younger. On the contrary The area near the core, highlighted by the blue spotlight, is the oldest cluster of stars.
Williams said “Galaxies form from the inside out. And it grows larger throughout its lifespan. The spiral arms sweep up the gas that would form the star. And the gas column will act to pull that same gas toward the black hole at the center of the galaxy.”
The images also allow scientists to revise our understanding of the structure of the dust and gas clouds that form stars and planets.
Janice Lee, astronomer at the Space Telescope Science Institute One of the PHANGS project scientists said: “These images are not only stunning. But it also tells the story of the cycle of star formation. This includes the process by which the energy and momentum released by young stars into space.”
Eric Rosolowski, an astronomer from the University of Alberta, said: “When using Hubble We will see starlight from the galaxy. But some of the light is blocked by clouds of dust.” This constraint makes it difficult to understand some of the galaxy’s processes. “But with Webb’s infrared imaging, We were able to see through this dust cloud to see stars hidden behind and within the dust cloud.”
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