Tag: spiral galaxy reasons

Reasons Behind Spiral Shape Of Milkyway Galaxy

reasons of spiral shape of milkyway galaxy; About 33% of known Galaxies are spiral with bulging centers. Astronomers believe that galaxies have spiral arms because galaxies rotate or spin around a central axis – and this is  because of something called “density waves.” Galactic thickness waves resemble water waves. Water itself doesn’t move over a lake – rather, wave vitality moves…

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