The atomic gas structure was discovered using the Five-hundred-meter Aperture Spherical Telescope. Atomic gas is the fundamental material from which all galaxies are formed. The evolution of galaxies is primarily a process of accreting atomic gas from the intergalactic medium and transforming it i
A map of the atomic hydrogen 21-cm line emission in the vicinity of Stephan’s Quintet, a famous compact group of galaxies discovered in 1887, overlaid on a deep optical color image. Credit: NASA, ESA, CSA, and STScIAtomic gas is the fundamental material from which all galaxies are formed. The evolution of galaxies is primarily a process of accreting atomic gas from the intergalactic medium and transforming it into stars.
Recent deep mapping observations of 21-cm line emission in the vicinity of the well-known compact group of galaxies “Stephan’s Quintet,” using the Five-hundred-meter Aperture Spherical Telescope’s led by Xu Cong, a researcher from the National Astronomical Observatories of the Chinese Academy of Sciences , revealed a very large atomic gas structure with a length of about 2 million light-years , making them currently the most sensitive observations of atomic hydrogen 21-cm line emission at this...
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