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2021-8-2 · 2003 November 15. LL Orionis: When Cosmic Winds Collide. Credit: Hubble Heritage Team ( AURA / STScI ), C. R. O''Dell ( Vanderbilt ), NASA. Explanation: This arcing, graceful structure is actually a bow shock about half a light-year across, created as the wind from young star LL Orionis collides with the Orion Nebula flow.