The shape of the galaxies depends on the speed of rotation

A group of Australian astronomers said that the shape of the galaxy depends on whether it turns fast or slow.

New research by Australian astrophysicists in CAASTRO Center shows that dark spiral galaxies spin at a slower rate, while spiral-shaped galaxies spin at a faster rate.

Danail Obreschkow, a researcher at the University of Western Australia, noted that scientists have long discussed the causes of the galaxies' shape, but have yet to agree. Some galaxies are very flat disks of many stars, others have more protruding disks or even hemispheres. Most of the studies in the last century only show the diversity of galaxies in the universe, and this time the scientists are more clear about the cause of that situation: The speed of rotation of the galaxies Galaxy is the determining factor of their shape.

Scientists surveyed 16 galaxies 10 to 50 million light-years from Earth based on THINGS research data conducted at the New Mexico Radio Observatory (NRAO). The shape of the spiral galaxy depends on the rotation speed and size that gradually changes over billions of years. Obreschkow astrophysicist compares twisted galaxies with elastic spins. If rotating in a static state, the elastic disk is quite small, while the rotation is strong, the disk is highly elastic due to the impact of centrifugal force.

The astrophysicist Obreschkow further explains: "Our spiral galaxy (Song Ngan) has a relatively flat convex shape that we can see in the sky at night. The white band of the Ngan River above It is a relatively thin line with relatively stable thickness, but if you look directly into the constellation of Sagittarius, you can see that the Ngan River is thicker and more convex. "