Retrieving "Milky Way Galaxy" from the archives

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1. Astronomy

   Linked via "Milky Way Galaxy"

   The Milky Way
   Our solar system resides within the Milky Way Galaxy, a barred spiral galaxy estimated to contain between 100 and 400 billion stars. The structure is organized into a central bulge, a thin disk containing spiral arms, and a surrounding dark matter halo. Measurements of rotation curves suggest that approximately 90% of the galaxy's mass is composed of non-luminous, non-baryonic Dark Matter [2].
   Cosmology

2. Black Holes

   Linked via "Milky Way galaxy"

   Accretion Disks and Jets: Matter spiraling into a black hole forms a superheated accretion disk. Friction within this disk causes it to emit intense X-rays and visible light just outside the event horizon. Some black holes also launch highly collimated relativistic jets from their poles.
   Gravitational Lensing: The strong gravity bends light rays from background sources, distorting their images—a form of gravitational lensing.
   Stellar Orbits: The motion of stars orbiting a central, unseen mass—most famously observed in the center of the [Milky Way galaxy](/e…