An article published in the journal “Astronomy & Astrophysics” reports the discovery of an anomalous structure in the Milky Way’s Sagittarius Arm. A team of researchers used observations made with NASA’s Spitzer Space Telescope and data collected by ESA’s Gaia space probe to locate a structure about 3,000 light-years long that has an orientation that’s very different from the rest of the Sagittarius Arm. Such structures have been identified in other galaxies but it’s the first time that one of them has been identified within the Milky Way. That’s not a surprise, as it’s difficult to study such large structures of the galaxy from the inside.