The Northern Summer Milky Way is part of our own galaxy seen from the inside. Bright star clouds and dark nebulae line the Milky Way from the constellation of Cygnus at lower left to Cassiopeia at upper right.
The large red emission nebulae are star-forming regions. Some are listed in the NGC (New General Catalog) and IC (Index Catalog).
Dark nebulae are opaque clouds of dust and matter in space that hide the light of stars behind them.