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    Pandora’s Cluster tagged posts

    Second-most Distant Galaxy discovered using James Webb Space Telescope

    November 14, 2023, Categories  Astronomy/Space

    composite image of pandora's cluster, with two close-up inset images
    The second- and fourth-most distant galaxies ever seen (UNCOVER z-13 and UNCOVER z-12) have been confirmed using the James Webb Space Telescope’s Near-Infrared Camera (NIRCam). The galaxies are located in Pandora’s Cluster (Abell 2744), shown here as near-infrared wavelengths of light that have been translated to visible-light colors. The scale of the main cluster image is labelled in arcseconds, which is a measure of angular distance in the sky. The circles on the black-and-white images, showing the galaxies in the NIRCam-F277W filter band onboard JWST, indicate an aperture size of 0.32 arcsec. Credit: Cluster image: NASA, UNCOVER (Bezanson et al., DIO: 10.48550/arXiv.2212.04026). Insets: Nasa, UNCOVER (Wang et al., 2023). Composition: Dani Zemba/Penn State. All Rights Reserved.
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    Dozens of New Ultra-Diffuse Galaxies discovered in Abell 2744

    January 4, 2017, Categories  Astronomy/Space

    Dozens of new ultra-diffuse galaxies discovered in Abell 2744

    Hubble Frontier Fields view of Abell 2744. Credit: NASA, ESA, and J. Lotz, M. Mountain, A. Koekemoer, and the HFF Team (STScI).

    Astronomers have found 76 new ultra-diffuse galaxies (UDGs) in the massive galaxy cluster designated Abell 2744 (also known as Pandora’s Cluster). The discovery updates the current census of galaxies in this cluster and could help better understand the nature of UDGs in general. UDGs are extremely-low-density galaxies. The largest UDGs have sizes similar the Milky Way but have only about 1% as many stars as our home galaxy. The mystery of UDGs is still baffling scientists as they try explain why these faint but large galaxies are not ripped apart by the tidal field of their host clusters...

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