Galaxies are composed of dust particles, dark matter, and stars, all held together by gravitational force. If you gaze out into the sky with the help of a professional telescope, you can see thousands of stars in a variety of shapes and sizes. Many galaxies are bunched together in groups or clusters. Since clusters contain so many galaxies relatively close together, it should not be surprising that galaxies sometimes collide with each other.
It is very common for galaxies to collide with other galaxies in the universe. In fact, the collision between galaxies are one of the main elements that drive their evolution in time. When two galaxies pass close to one another, the gravitational force they exert on one another cause both galaxies to interact.
When a collision between two galaxies occur, clouds of gas inside each galaxy may become squeezed. The cloud compression can cause galaxies to collapse under their own gravity. This process can lead to a big explosion of star formation in interacting galaxies and leaving a new-generation of stars in a galaxy.
Astronomers watch the Big Turmoil as thousands of galaxies collide
Astronomers using Chandra X-Ray and VLA observatory have revealed new details of violent collision involving at least four clusters of galaxies. Combined with the recent research through NASA’s Hubble Space Telescope, the new details depict a complex region more than five million light-years from the Earth where the interactions are triggering a host of phenomena that astronomers still are working to understand.
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