19 dic 2021 01:27 GMT
An important hypothesis is that they are remnants of tidal weapons from a Milky Way disk ejected by various satellites in the past.
International Committee of Astronomers They have created New map of the outer disk of the Milky Way, which revealed the presence of massive structures at the edge of the galaxy.
According to Cervin Laford, the lead author of the research, this area has not been fully explored because of the dust that “covers most of the middle galaxy”. “Although dust affects the brightness of a star, its motion is not affected. As a result, its orbit can be used to perform tomography of the outer parts of the galaxy,” he explained.
In this way, massive rotating threads of obscure source were identified. Experts consider it to be the remnants of tidal waves from the Milky Way disk emitted by various satellites in the past.
“Another possibility is that not all of these structures are actually real disk infrastructures, but rather vertical density wave ridges, which are seen in projection, creating an optical illusion that the disk is highly infrastructured,” Laporte added.
The discovery was made by the European Space Agency’s Kia Space Laboratory, a project that seeks to map the Milky Way in three dimensions.
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