Some galaxies are barred spiral galaxies and some are unbarred. Because of this, they ran the model with many slightly different starting configurations to account for the different chaotic situations.įirst, it should be noted that all analyses that this team did was assuming a spiral galaxy with no bar. This modelling has chaotic characteristics, meaning if the model was slightly off they would get unrepresentative results. They used a modelling technique that combines many other techniques to see if they could be consistent with one another. They used these star orbits to determine the average rotation curve throughout the spiral arm to model the movement of the spiral arm with the rest of the galaxy. They did their analysis by looking at the individual orbits of the biggest stars living in the spiral arms in our current galaxy. These scientists have investigated the theory of these “perturbations.” In this study, the researchers were hoping to uncover some facts about the stable evolution of the spiral arms to determine how galaxies following this model would evolve. When something is perturbed, it means it has been influenced in such a way that it alters its normal behavior. This study researches the “perturbed disk” theory of spiral arms. We will also be able to determine if spiral galaxies can turn into elliptical galaxies or if elliptical galaxies can become spirals. However, we don’t know how the arms initially formed, or the shape they will take in the future! The answers to these questions will tell us how galaxies change and grow, as if they are alive! It is unclear whether different types of galaxies that we see are galaxies in different “stages of life” or if they are just fundamentally different collections of stars. We understand that this concept should be how the spiral arms work. Therefore, the spiral arms of a galaxy are caused by a bigger disturbance that travels around the disk of the galaxy. They found that they do not orbit the center of the spiral at the same rate. To observe this wavelike action, physicists have studied the individual orbital patterns of the stars. In this wave, the stars are pulled closer together and then further apart, propagating the wave. We now understand the spiral arms of a galaxy to be a wave. A competing hypothesis was that the galaxy should be considered a type of fluid, and the stars that make up the galaxy are just being carried through the fluid by gravity, like cereal pieces swirling in milk. The shape of the arms would also not change much. This would imply that every part of the arm rotates around the center of the galaxy at exactly the same pace, like a wood screw being driven into a board. Originally, these spiral arms were thought to be rigid arms attached to the center of the galaxy. The movement and evolution of these spirals is not well understood in astrophysics. Many galaxies are in the shape of spirals, including our own Milky Way Galaxy. Galaxies come in all shapes, sizes, and colors. What new treatments are there for neurodegenerative diseases?.What new technology is coming around the corner?.What might life look like elsewhere in the Universe?.What is going on with the Earth’s climate?.What effects do different foods have on our bodies and health?.What do we know about autoimmune diseases?.How does technology impact our daily lives?.How do we feed people now and in the future?.How do scientists study drugs and vaccines?.How do microbes respond to changes in their surroundings?.How can microbes clean up the environment?.
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