![]() ![]() In the process of these collisions, stellar orbits get randomized, and the galaxy ends up more elliptical in shape. The current general picture is that a galaxy will generally start out as a spiral galaxy, but after merging with another galaxy, the gas between two galaxies will collide and form stars. It is also thought that galaxy mergers play a major role in determining the ultimate shape of a galaxy. It seems that one of the important distinguishing factors between spiral and elliptical galaxies is that spiral galaxies have a relatively large amount of gas, whereas elliptical galaxies have a relatively small amount of gas. ![]() The short answer is that it's currently not well understood. We make our world significant by the courage of our questions and by the depth of our answers. For more open-ended questions, try /r/AskScienceDiscussion | Sign up to be a panelist!.Looking for flair? Sign up to be a panelist!.Neuroscience, Neurology, Neurochemistry, Cognitive NeuroscienceĪsk Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, PsychologyĪskScience AMA Series: Long COVID and Blood ProtiensĪsk Anything Wednesday - Economics, Political Science, Linguistics, AnthropologyĪskScience AMA Series: NASA Software CatalogĪsk Anything Wednesday - Physics, Astronomy, Earth and Planetary ScienceĪsk Anything Wednesday - Engineering, Mathematics, Computer science Medicine, Oncology, Dentistry, Physiology, Epidemiology, Infectious Disease, Pharmacy, Human Body Psychology, Cognitive Psychology, Developmental Psychology, Abnormal, Social Psychology Social Science, Political Science, Economics, Archaeology, Anthropology, Linguisticsīiology, Evolution, Morphology, Ecology, Synthetic Biology, Microbiology, Cellular Biology, Molecular Biology, Paleontology ![]() Mechanical Engineering, Electrical Engineering, Structural Engineering, Computer Engineering, Aerospace EngineeringĬhemistry, Organic Chemistry, Polymers, Biochemistry Mathematics, Statistics, Number Theory, Calculus, AlgebraĪstronomy, Astrophysics, Cosmology, Planetary FormationĬomputing, Artificial Intelligence, Machine Learning, ComputabilityĮarth Science, Atmospheric Science, Oceanography, Geology Theoretical Physics, Experimental Physics, High-energy Physics, Solid-State Physics, Fluid Dynamics, Relativity, Quantum Physics, Plasma Physics
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