Gap found in one of the spiral arms of the Milky Way

Astronomers have a rough idea of ​​the size and shape of the arms of the Milky Way, so when

in a pinpoint study, unexpecteddiscoveries. However, there are difficulties, scientists cannot see the full structure of the galaxy, because the Earth is inside it. It is as if you were standing in the middle of Times Square and trying to draw a map of Manhattan.

To learn more about our galaxy, the authorsfocused on the closest part of one of the sleeves, it is called the Sagittarius Shoulder. The authors used NASA's Spitzer telescope to search for newborn stars in clouds of gas and dust.

Previously, scientists have deduced a pattern that youngstars and nebulae are closely related to the shape of the arms in which they are located. To obtain a 3D image of the arm segment, the scientists used the latest information about the area from ESA (European Space Agency).

The combined data showed that the long thinThe Sagittarius Shoulder structure consists of young stars moving at almost the same speed and in the same direction. This group of stars and star-forming gas clouds literally sticks out of the spiral arm.

Schematic representation of the gap

There are four nebulae in this group:

  • Eagle nebula,
  • the Omega Nebula,
  • the Trifid nebula,
  • the lagoon nebula.

Image of nebulae

Astronomers have yet to fully understand how spiral arms form in galaxies like ours.

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