One nice illustration of the conservation of angular momentum involves a close examination of ice skaters during their spins.

In this performance by Yu-na Kim at the 2013 Worlds (or you can see a local copy ),

• watch her spin at about 2:50 into the video
• watch her prepare for a triple jump, and then jump and spin, at about 0:50 into the video

Dorothy Hamill spins in the 1985 World Pros artistic program. (or look at local version ).

Stars form as large clouds of gas and dust collapse.

Image courtesy of NASA/ESA/STScI/J. Hester and P. Scowen

Images courtesy of NASA/JPL-CalTech/N. Evans and Spitzer Space Telescope

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