Why Does Everything In The Universe Spin?

The Earth and the Milky Way are constantly rotating, but why?

Read More:
How Fast Does the Earth Rotate?
http://www.universetoday.com/26623/how-fast-does-the-earth-rotate/
“The ground feels firm and solid beneath your feet. Of course, the Earth is rotating, turning once on its axis every day. Fortunately gravity keeps you firmly attached to the planet, and because of momentum, you don’t feel the movement – the same way you don’t feel the speed of a car going down the highway. But how fast does the Earth rotate?”

Why does the Milky Way rotate?
http://phys.org/news/2015-02-milky-rotate.html
“We live in a galaxy that is called the Milky Way. It's called a barred spiral galaxy, which means that it has a spiral shape with a bar of stars across its middle.”

Why and how do planets rotate?
http://www.scientificamerican.com/article/why-and-how-do-planets-ro/
“Stars and planets form in the collapse of huge clouds of interstellar gas and dust. The material in these clouds is in constant motion, and the clouds themselves are in motion, orbiting in the aggregate gravity of the galaxy.”

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Видео Why Does Everything In The Universe Spin? канала Seeker