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NASA's Webb captures an ethereal view of NGC 346

Date:
October 11, 2023
Source:
NASA/Goddard Space Flight Center
Summary:
One of the greatest strengths of NASA's James Webb Space Telescope is its ability to give astronomers detailed views of areas where new stars are being born. The latest example, showcased here in a new image from Webb's Mid-Infrared Instrument (MIRI), is NGC 346 -- the brightest and largest star-forming region in the Small Magellanic Cloud.
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Filaments of dust and gas festoon this star-forming region in a new infrared image from MIRI.

One of the greatest strengths of NASA's James Webb Space Telescope is its ability to give astronomers detailed views of areas where new stars are being born. The latest example, showcased here in a new image from Webb's Mid-Infrared Instrument (MIRI), is NGC 346 -- the brightest and largest star-forming region in the Small Magellanic Cloud.

The Small Magellanic Cloud (SMC) is a satellite galaxy of the Milky Way, visible to the unaided eye in the southern constellation Tucana. This small companion galaxy is more primeval than the Milky Way in that it possesses fewer heavy elements, which are forged in stars through nuclear fusion and supernova explosions, compared to our own galaxy.

Since cosmic dust is formed from heavy elements like silicon and oxygen, scientists expected the SMC to lack significant amounts of dust. However the new MIRI image, as well as a previous image of NGC 346 from Webb's Near-Infrared Camera released in January, show ample dust within this region.

In this representative-color image, blue tendrils trace emission from material that includes dusty silicates and sooty chemical molecules known as polycyclic aromatic hydrocarbons, or PAHs. More diffuse red emission shines from warm dust heated by the brightest and most massive stars in the heart of the region. An arc at the center left may be a reflection of light from the star near the arc's center. (Similar, fainter arcs appear associated with stars at lower left and upper right.) Lastly, bright patches and filaments mark areas with abundant numbers of protostars. The research team looked for the reddest stars, and found 1,001 pinpoint sources of light, most of them young stars still embedded in their dusty cocoons.

By combining Webb data in both the near-infrared and mid-infrared, astronomers are able to take a fuller census of the stars and protostars within this dynamic region. The results have implications for our understanding of galaxies that existed billions of years ago, during an era in the universe known as "cosmic noon," when star formation was at its peak and heavy element concentrations were lower, as seen in the SMC.The James Webb Space Telescope is the world's premier space science observatory.


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Materials provided by NASA/Goddard Space Flight Center. Note: Content may be edited for style and length.


Cite This Page:

NASA/Goddard Space Flight Center. "NASA's Webb captures an ethereal view of NGC 346." ScienceDaily. ScienceDaily, 11 October 2023. <www.sciencedaily.com/releases/2023/10/231011182251.htm>.
NASA/Goddard Space Flight Center. (2023, October 11). NASA's Webb captures an ethereal view of NGC 346. ScienceDaily. Retrieved May 29, 2024 from www.sciencedaily.com/releases/2023/10/231011182251.htm
NASA/Goddard Space Flight Center. "NASA's Webb captures an ethereal view of NGC 346." ScienceDaily. www.sciencedaily.com/releases/2023/10/231011182251.htm (accessed May 29, 2024).

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