Shulou(Shulou.com)11/24 Report--

Thank you, CTOnews.com netizens. Hello, rabbit clue delivery! CTOnews.com, May 17, recently, the Xu Ye research team of Zijinshan Observatory of the Chinese Academy of Sciences and the National Astronomical Observatory of the Chinese Academy of Sciences have put forward a new understanding of the shape of the spiral arm of the Milky way, which has changed people's traditional understanding of the structure of the spiral arm of the Milky way. They believe that the Milky way is more like an ordinary multi-arm galaxy, consisting of two symmetrical arms inside and irregular arms outside, rather than the special shape of the four previously widely accepted arms from the inside to the outside. The research has been published online in the Astrophysical Journal.

CTOnews.com note: a redrawn aerial view of the spiral arm structure of the Milky way galaxy. The colored lines represent the spiral arms traced by the maser, and the black lines represent the spiral arms near the sun traced by young stars and open star clusters. There are three main forms of spiral galaxies in the universe: macroimages, multi-arms and floc. In multi-arm galaxies similar to the Milky way, the most common is that there are two spiral arms inside and multiple spiral arms on the outside (about 83%), while four spiral arms extending from the inside to the outside are very rare (about 2%). But most astronomers used to think that the Milky way is this special form.

Because we live in the Milky way, we cannot see the shape of the Milky way directly from a bird's-eye view. Using all the existing high-precision astrometric data, the team redrew the spiral arm structure of the Milky way using celestial maser, young stars and open star clusters as "lighthouses" marking the position of the spiral arm.

The results show that the Milky way is a multi-arm galaxy with two symmetrical spiral arms extending outward, namely, the Immortal arm and the moment ulnar arm. The outer part bifurcates and forms several irregular and long spiral arms, including centaur arm, centaur arm, bottom arm and local arm. The Milky way does not look special.

The result of the study of the Milky way in traditional cognition subverts the traditional understanding of the spiral arm structure of the Milky way and creates a new height in the study of the structure of the Milky way. At present, the research team is preparing for more accurate measurements in the future, hoping to finally reveal the true face of the spiral arm structure of the Milky way galaxy.

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