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🔭💫Intriguing Discovery: A Gigantic, Rotating Spiral with a Hidden Heart. The Milky Way is a barred spiral galaxy spanning over 100,000 light-years in diameter. It contains between 100 and 400 billion stars - and possibly even more planets. At its center lies Sagittarius A*, a supermassive black hole about 4 million times the mass of our Sun. Though it cannot be seen directly, its presence is known by how it warps the motion of stars around it. Our galaxy rotates once every 225-250 million...
