How did the solar system form? NASA's Space Place

How did our busy stellar neighborhood come to be?

http://spaceplace.nasa.gov/solar-system-formation/en/

"The solar system is a pretty busy place. It's got all kinds of planets, moons, asteroids, and comets zipping around our Sun. But how did this busy stellar neighborhood come to be? Our story starts about 4.6 billion years ago, with a wispy cloud of stellar dust..."

Narrated animation with downloadable posters

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