NASA recently issued a press release showing a photo taken by the Hubble Space Telescope. The protagonist is Arp 122, which is 570 million light-years away from the Earth.
Arp 122 is a very peculiar galaxy. It is actually composed of two galaxies-NGC 6040 (tilted, twisted spiral galaxy) and LEDA 59642 (round, front-facing spiral galaxy). These two galaxies A collision is occurring.
Poking out in the lower left corner is the elliptical galaxy NGC 6041, which is the central member of the galaxy cluster where Arp 122 is located, but was not involved in this great merger.
Galaxies are made up of stars and their solar systems, dust, gas and invisible dark matter. Therefore, after the collision of galaxies, these components will undergo huge changes due to gravity.
Over time, this can radically change the structure of two (or more) colliding galaxies, sometimes ultimately forming a merged galaxy.
NASA also stated in the press release that the Milky Way is “about to” collide with its nearest neighbor, the Andromeda Galaxy (M31). It will take at least 4 billion years to actually meet, and the entire collision process may take hundreds of millions of years.
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