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    Discovery of ‘mini halo’ points to how the early universe was formed

    June 27, 2025, Categories  Astronomy/Space

    A distant galaxy cluster with a newly discovered radio mini-halo
    This stunning image reveals a distant galaxy cluster teeming with energy: galaxies shine in visible light (white), ghostly red clouds unveil a newly discovered radio mini-halo—the most distant ever detected—and blue wisps trace the hot gas glowing in X-rays.
    Credit: Chandra X-ray Center (X-ray: NASA/CXC/SAO; Optical: NASA/ESA/STScI; Radio: ASTRON/LOFAR; Image Processing: NASA/CXC/SAO/N. Wolk)

    Astronomers have uncovered a vast cloud of energetic particles—a “mini halo”—surrounding one of the most distant galaxy clusters ever observed, marking a major step forward in understanding the hidden forces that shape the cosmos.

    The mini-halo is at a distance so great that it takes light 10 billion years to reach Earth, making it the most distant ever found, doubling the previous dista...

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    New Insight into Galaxy Cluster’s Spectacular ‘Mini-Halo’

    June 14, 2017, Categories  Astronomy/Space

    Radio-emitting mini-halo in Perseus Cluster

    VLA image of radio-emitting mini-halo in the Perseus Cluster of galaxies. Radio emission in red; optical in white. Credit: Gendron-Marsolais et al.; NRAO/AUI/NSF; NASA; SDSS.

    New details help unravel mystery of structure’s origin. Astronomers using the Karl G. Jansky Very Large Array (VLA) have discovered new details that are helping them decipher the mystery of how giant radio-emitting structures are formed at the center of a cluster of galaxies. The scientists studied a cluster of thousands of galaxies more than 250 million light-years from Earth, named the Perseus Cluster after the constellation in which it appears. Embedded within the center, the Perseus Cluster hosts a pool of superfast particles that emit radio waves, creating a radio structure known as a “mini-halo...

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