... Generations of Stars in W5 . ... W5's sculpted clouds of cold gas and dust seem to form fantastic shapes in this impressive mosaic of infrared images from the Spitzer Space Telescope . ... New evidence indicates that successive generations of stars formed in the W5 region in an expanding pattern of triggered star formation . ... Publications with keywords: star formation - infrared . Publications with words: star formation - infrared . ... Simeis 188 in Stars, Dust and Gas . ...