Home » The Milky Way “arm” broke a 3,000-light-year-long protrusion discovered by astronomers | Technology | New Head Shell Newtalk

The Milky Way “arm” broke a 3,000-light-year-long protrusion discovered by astronomers | Technology | New Head Shell Newtalk

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The picture shows astronomers’ current understanding of the large-scale structure of the Milky Way. Image: Reproduced from NASA/JPL-Caltech

According to recent news from the US CNET website, a research by the US National Space Administration (NASA) has shown that there is a “break” on a cantilever of the Milky Way, which stretches for about 3,000 light years. Astronomers describe it as a piece of debris protruding from a wooden board, but Because the Earth is inside the galaxy, measuring the shape, size, and number of cantilevers is a challenge.

NASA reported that scientists have discovered previously undiscovered features on the Sagittarius arm of the Milky Way. A group of young stars and star-forming gas clouds are protruding from a spiral arm of the Milky Way, stretching for about 3,000 light years. This is the first The main structure, which was determined to be in a completely different direction from the arm, looked like a bone protruding from a severe fracture.

The newly discovered features provide insight into the large-scale structure of the Milky Way, but it is difficult to study it from the location inside the Earth. NASA gives an example. This is similar to standing in the center of Times Square, trying to draw a map of Manhattan Island. It is difficult to accurately measure the distance if two buildings are in the same block or separated by a few streets.

In order to obtain a 3D view of the arm segment, the scientists used the latest data from the ESA (European Space Agency) Gaia mission to accurately measure the distance to the stars. Comprehensive data shows that the slender structure associated with the Sagittarius arm is made up of young stars, which move in space at almost the same speed and in the same direction.

See also  How much do you and I know about the Milky Way | Milky Way | Universe | Spiral Arm | Stellar

The NASA report also mentioned that astrophysicist at the California Institute of Technology and the first author of the new paper Michael Kuhn (Michael Kuhn) said that the key feature of spiral arms is the degree to which they wrap around the galaxy. This feature is through the pitch of the arm. Measured by angle, the pitch angle of a circle is 0 degrees, and as the spiral becomes more open, the pitch angle increases.

Alberto Krone-Martins, a member of the Gaia Data Processing and Analysis Alliance (DPAC), said that only the recent direct distance measurement from Gaia can make the geometry of this new structure so clear. When I put the Spitzer data together and saw the detailed 3D map, I realized that this area has quite a lot of complexity, which was not obvious before.

Astronomers have a general understanding of the size and shape of the arms of the Milky Way, but there are still many unknowns. NASA said that it has not fully understood what causes galaxies like ours to form spiral arms, but through this major discovery , Astronomers have a new understanding of the Milky Way.

According to recent news from the US CNET website, a study by the US National Space Agency (NASA) has shown that there are “breaks” on a cantilever of the Milky Way.

Stretching for about 3,000 light years, astronomers describe it as a piece of debris protruding from a wooden board.

But because the Earth is located inside the galaxy, measuring the shape, size and number of cantilevers is a challenge

.

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