Sprawling [ http://www.allthesky.com/nebulae/ ic1396-e.html ] across hundreds of light-years, emission nebula IC 1396 mixes glowing cosmic gas and dark dust clouds [ http://antwrp.gsfc.nasa.gov/apod/ap010720.html ]. Stars are forming in this area, only about 3,000 light-years [ http://chandra.harvard.edu/photo/cosmic_distance.html ] from Earth. This detailed view [ http://www.pbase.com/kvwood/image/90008205 ] was created in light primarily emitted by hydrogen [ http://en.wikipedia.org/wiki/Hydrogen ] gas, recorded through a filter that [ http://www.astropix.com/HTML/I_ASTROP/I11/I11.HTM ] narrowly transmits a wave [ http://amazing-space.stsci.edu/resources/explorations/ light/CatchWaves_waves.html ]length characteristic of glowing hydrogen atoms [ http://csep10.phys.utk.edu/astr162/lect/light/absorption.html ] in the nebula. Among the intriguing dark shapes within IC 1396 [ http://en.wikipedia.org/wiki/Elephant%27s_Trunk_nebula ], the winding Elephant's Trunk nebula [ http://antwrp.gsfc.nasa.gov/apod/ap071018.html ] lies just left center. IC 1396 lies in the high and far off constellation of Cepheus [ http://www.astropix.com/HTML/E_SUM_N/CEPHEUSO.HTM ].