... 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. Adrift in Orion's stellar nursery and still in its formative years, variable star LL Orionis produces a wind more energetic than the wind from our own middle-aged sun. ...