Astronomers may have spotted a new spiral arm of the Milky Way galaxy

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Space 16 August 2021

Illustration of our galaxy, the Milky Way seen obliquely, with the arms and the cardinal barroom successful their approximate known locations. There are 4 large arms and 1 limb fragment (Orion-Cygnus oregon Local) wherever the Sun is found. In the annotated mentation of this image, the yellowish dot indicates the presumption of the Solar System astir 25000 ly from the galactic core. The Norma and Outer arms are successful information the same, but the 2 names notation to antithetic parts of it. The aforesaid is existent of the alleged 3kpc (3 kilo-parsec) arm, which further retired becomes the Perseus arm.

Astronomers whitethorn person recovered portion of a never-before-seen limb of the Milky Way galaxy. This immense watercourse of state – named Cattail due to the fact that of its long, bladed signifier – is the largest and astir distant state filament ever spotted successful our galaxy.

Keping Qiu astatine Nanjing University successful China and his colleagues recovered 1 extremity of Cattail utilizing the Five-hundred-meter Aperture Spherical vigor Telescope (FAST) successful China. They past searched information from the HI4PI survey, an all-sky hunt for hydrogen gas, …

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