قالب وردپرس درنا توس
Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ River of stars A flow of billions of years through the southern sky

River of stars A flow of billions of years through the southern sky



  river of stars gaia esa 201834950 fig1 1
In this special projection, the Milky Way bends around the entire image of the arc. The stars in the stream are reflected in red and cover almost the entire southern galactic hemisphere. Astronomy and Astrophysics

Astronomers at the University of Vienna identified a river of stars flowing through our galaxy and covering most of the southern sky. The 4,000 star rated stars were born together and moved together during the last billion years, making the river a rarity, since most star clusters are rapidly dispersing when they are formed. do not contain enough stars to create enough gravity to keep the clusters together, and the gravitational forces quickly dissipate stars along the entire galaxy. But from observation of outer space astronomers have determined that there are several clusters of sufficient mass to stay connected for millions of years. A team from Vienna was able to identify such a cluster relative to the Milky Way and compare it with the Gaia satellite with the European Space Agency

. One of the authors of the article Alves said in a statement. "Astronomers have long been looking at this new stream and through it as it covers most of the night sky, but only now it realizes that it is, and it is huge, and shockingly close to the Sun. Finding things that are close to the house is very useful, which means that they are not too weak and not too blurry for further detailed study, as astronomers dream. " the stars were moving together. Using Gaia data, they were able to identify 200 stars in the river, but evidence suggests that at least 4,000 stars are flowing. Since he is so old, this cluster has rotated four times around the galaxy, giving gravity forces time to pull the cluster into its current-shaped structure. a hunting target for the planet and can help us learn more about how stars move within galaxies.

The results are published in the journal Astronomy & Astrophysics










.
Source link