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Why galaxies spin: angular momentum from cosmic mergers

Original: 🌌 TIL: Galaxies spin throughout # space due to the # physics of angular momentum and the gravitational pull of early mat

Scientists explain that galaxies rotate because of angular momentum generated when ancient gas clouds and dust collided off-center in the early universe. These initial spiraling motions were conserved over billions of years, amplified through generations of cosmic mergers and shaped by the gravitational pull of early matter, producing the spinning structures seen across the universe today.

Why now: The physics behind galactic rotation is a popular science topic that keeps resurfacing as people share educational space facts.

galaxiesangular momentumearly universe

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Evidence

• 🌌 TIL: Galaxies spin throughout # space due to the # physics of angular momentum and the gravitational pull of early matter. When ancient gas clouds and dust collided off-center, their initial spiraling motion was conserved during # fusion . Over generations of cosmic mergers… · tksst@fediscience.org · 1

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