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Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ A "river of stars," which was passing through the Milky Way, was in the ordinary sight for 1 billion years

A "river of stars," which was passing through the Milky Way, was in the ordinary sight for 1 billion years



In this stereographic projection, the Milky Way is bent around the whole photo in the arc, showing the newly discovered river of stars in red and covering almost the entire Southern Galactic Hemisphere

Credit: Astronomy and Astrophysics

A billion years ago, a group of stars formed in our galaxy. Since then, this cluster has broken four long circles around the edge of the Milky Way. Meanwhile, the gravitation of the Milky Way has spread, which is gathered from one spot in a long starstream. Right now, the stars pass relatively near the Earth, about 330 light-years away. Scientists say the river of stars can help determine the mass of the entire Milky Way.

Astronomers have seen these stars before, mixed with many stars around them. But until now they did not realize that the stars were part of a group. The river, which is 1

,300 light-years long and 160 light-years wide, passes through the vast, dense starfield of the Milky Way. But 3D-mapped data from the spacecraft of the European Space Agency, Gaia, showed that the stars in the stream are moving together at approximately the same speed and in the same direction.

"Identifying the nearby streams of discs is like searching for the proverbial needle, and astronomers have long been watching and going through this new stream, as it covers most of the night sky, but only now realizes it is there, and is (19459018)

While the space is full of these stellar streams, they are often difficult to study because they are a huge and shocking near the sun.Joa Alves, an astronomer at the University of Vienna and a second author of the article, said in a statement. well-shaded among the surrounding stars

"Finding things close to home is very useful, it means they are not too weak or too blurred for further detailed study, astronomer's dream [an] "Scientists suspect that star clusters, like the one that eventually became that stellar stream, can reveal how galaxies get their stars, but in a large, galaxy like the Milky Way, these clusters usually ending with fragmentation, gravity attracts separate stars in different directions. [Amazing Astronomy: Victorian-Era Illustrations of the Heavens]

This stream is big enough and heavy enough to remain intact (though sprawled) in a billion years when it was circling the Galactic Center. There may be more stars in the stream than those found in Gaia's initial data.

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