Gravitation

Gravitation

The Milky Way galaxy is a disk-shaped collection of dust, planets, and billions of stars, including our Sun and solar system. The force that binds it or any other galaxy together is the same force that holds the Moon in orbit and you on Earth- the gravitational force. That force is also responsible for one of nature’s strangest objects: the black hole, a star that has completely collapsed onto itself. The gravitational force near a black hole is so strong that not even light can escape it.

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