File:A Spiral Amongst Thousands (52660766241).jpg

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Description	Welcome to Galactic Park Taken during instrument calibration, this image helped test Webb's ability to dig up galactic "fossils." Ancient galaxies are so far that as space expands, their light has stretched into infrared wavelengths — Webb's specialty. Did that large spiral galaxy towards the bottom of the image catch your eye? Named LEDA 2046648, it’s a little over a billion light-years from Earth and located in the constellation Hercules. Using images such as this one, scientists can compare galactic “dinosaurs” with modern galaxies. In turn, this helps us learn more about how galaxies evolve — making Webb the ultimate space paleontologist. Read more and download here: <a href="https://esawebb.org/images/potm2301a/" rel="noreferrer nofollow">esawebb.org/images/potm2301a/</a> Credits: ESA/Webb, NASA and CSA, A. Martel. Image description: A crowded field of galaxies is interspersed with bright 8-pointed stars on a dark background. The galaxies and stars come in a variety of sizes and colors, ranging from bluish white to orange. Some galaxies are large enough to make out spiral arms, while others look like faint smudges or pinpricks. The most prominent feature is a large, detailed spiral galaxy called LEDA 2046648, seen at an oblique angle towards the bottom of the frame. A smaller spiral galaxy is just below it. About one-quarter the size of its larger companion, this small galaxy looks like a miniature version of LEDA 2046648. Both of these spiral galaxies have glowing cores and areas of star formation lighting up their pale pink arms.
Date	31 January 2023, 06:00
Source	A Spiral Amongst Thousands
Author	NASA's James Webb Space Telescope from Greenbelt, MD, USA

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This image was originally posted to Flickr by James Webb Space Telescope at https://flickr.com/photos/50785054@N03/52660766241. It was reviewed on 28 October 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

28 October 2023

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- Kính thiên văn Không gian James Webb

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Date and time of data generation	06:00, 31 January 2023
Short title	A Spiral Amongst Thousands
Credit/Provider	ESA/Webb, NASA & CSA, A. Martel
Source	ESA/Webb
Image title	A crowded field of galaxies throngs this Picture of the Month from the NASA/ESA/CSA James Webb Space Telescope, along with bright stars crowned with Webb’s signature six-pointed diffraction spikes. The large spiral galaxy at the base of this image is accompanied by a profusion of smaller, more distant galaxies which range from fully-fledged spirals to mere bright smudges. Named LEDA 2046648, it is situated a little over a billion light-years from Earth, in the constellation Hercules. One of Webb’s principle science goals is to observe distant — and hence ancient — galaxies to understand the details of their formation, evolution, and composition. Webb’s keen infrared vision helps the telescope peer back in time, as the light from older, more distant galaxies is redshifted towards infrared wavelengths. Comparing these galactic fossils to modern galaxies will help astronomers understand how galaxies grew to form the structures we see in the universe today. Webb will also probe the chemical composition of thousands of galaxies to shed light on how heavy elements were formed and built up as galaxies evolved. To take full advantage of Webb’s potential for galaxy archeology, astronomers and engineers must first calibrate the telescope’s instruments and systems. Each of Webb’s instruments contains a labyrinthine array of mirrors and other optical elements that redirect and focus starlight gathered by Webb’s main mirror. This particular observation was part of the commissioning campaign for Webb’s Near-InfraRed Imager and Slitless Spectrograph (NIRISS). As well as performing science in its own right, NIRISS supports parallel observations with Webb’s Near-InfraRed Camera (NIRCam). NIRCam captured this galaxy-studded image while NIRISS was observing the white dwarf WD1657+343, a well-studied star. This allows astronomers to interpret and compare data from the two different instruments, and to characterise the performance of NIRISS. [Image description: M
Publisher	ESA/Webb
Usage terms	Creative Commons Attribution 4.0 International License
JPEG file comment	A crowded field of galaxies throngs this Picture of the Month from the NASA/ESA/CSA James Webb Space Telescope, along with bright stars crowned with Webb’s signature six-pointed diffraction spikes. The large spiral galaxy at the base of this image is accompanied by a profusion of smaller, more distant galaxies which range from fully-fledged spirals to mere bright smudges. Named LEDA 2046648, it is situated a little over a billion light-years from Earth, in the constellation Hercules. One of Webb’s principle science goals is to observe distant — and hence ancient — galaxies to understand the details of their formation, evolution, and composition. Webb’s keen infrared vision helps the telescope peer back in time, as the light from older, more distant galaxies is redshifted towards infrared wavelengths. Comparing these galactic fossils to modern galaxies will help astronomers understand how galaxies grew to form the structures we see in the universe today. Webb will also probe the chemical composition of thousands of galaxies to shed light on how heavy elements were formed and built up as galaxies evolved. To take full advantage of Webb’s potential for galaxy archeology, astronomers and engineers must first calibrate the telescope’s instruments and systems. Each of Webb’s instruments contains a labyrinthine array of mirrors and other optical elements that redirect and focus starlight gathered by Webb’s main mirror. This particular observation was part of the commissioning campaign for Webb’s Near-InfraRed Imager and Slitless Spectrograph (NIRISS). As well as performing science in its own right, NIRISS supports parallel observations with Webb’s Near-InfraRed Camera (NIRCam). NIRCam captured this galaxy-studded image while NIRISS was observing the white dwarf WD1657+343, a well-studied star. This allows astronomers to interpret and compare data from the two different instruments, and to characterise the performance of NIRISS. [Image description: Many stars and galaxies lie on a dark background, in a variety of colours but mostly shades of orange. Some galaxies are large enough to make out spiral arms. Along the bottom of the frame is a large, detailed spiral galaxy seen at an oblique angle, with another galaxy about one-quarter the size just beneath it. Both have a brightly glowing core, and areas of star formation which light up their spiral arms.] Links Wider view of LEDA 2046648 Video of A Spiral Amongst Thousands
Orientation	Normal
Horizontal resolution	25.4 dpi
Vertical resolution	25.4 dpi
Software used	Adobe Photoshop 23.5 (Windows)
File change date and time	23:44, 24 January 2023
Y and C positioning	Centered
Exif version	2.32
Date and time of digitizing	11:37, 13 January 2023
Meaning of each component	Y Cb Cr does not exist
Supported Flashpix version	1
Color space	Uncalibrated
IIM version	4
Keywords	LEDA 2046648
Bits per component	16 16 16
Compression scheme	Uncompressed
Height	2,843 px
Width	4,218 px
Pixel composition	RGB
Number of components	3
Contact information	https://esawebb.org ESA Office, Space Telescope Science Institute, 3700 San Martin Dr Baltimore, MD, 21218 United States
Type of media	Observation
Date metadata was last modified	00:44, 25 January 2023
Unique ID of original document	xmp.did:7f39be90-406a-aa4d-b28e-22bea27e0c38

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