Rotation main content.

Rotation

Part of Hall of the Universe.

Rotation_HERO AMNH/D. Finnin

Giant rotating clouds that collapse under their own weight produce spinning disks.

Ice-skaters spin faster when they pull their limbs in tight. The same principle applies to the collapsing cloud that formed the solar system. As a rotating cloud shrinks, it spins faster. Eventually, the rotation inhibits further collapse within a