NGC 7538 is also known as Sh2-158. In the Wikipedia it is also named as “ Dreyer object”, but I have my doubts about this name. The search for “Dreyer object” does not lead to NGC7538, and on the other hand all the objects in the NGC catalog are objects of John L. E. Dreyer, since she was his compiler in 1988. There is a “Dreyer Nebula” located in Lacerta. NGC7538 is an star cluster surrounded by an emission nebula, with a total mass equivalent to 400,000 suns. It is located about 9000 light-years away. It is observed in the constellation Cepheus, near the famous Bubble Nebula. It also appears often in photographs of Sh2-157 (The Lobster Claw). Its size in our sky is about 10'x6' arc. It is a factory of stars. It is composed of neutral hydrogen and dust. It contains numerous ultra-compact and very cold clouds in process of condensation. Thirteen of these protostars have a mass greater than 40 times the mass of the Sun, and will give rise to large supermassive stars. Newly formed stars emit large molecular flows (jets of molecules or gas in a molecular state). These stars show a disk of hot matter falling into them, and jets of matter coming out of their poles, just like black holes. These structures are largely hidden by dense dust clouds, which emit far infrared radiation. With all these phenomena, its structure is complex and chaotic, far from the relatively uniform appearance of many emission nebulae. It reminds to me the structure of NGC 604, another star factory located in one of the arms of the Triangle galaxy (M33).The photo is made with narrow band filters HII, OIII and SII, The color is composed with a classic Hubble palette (SHO). I shot it over 10 nights in October, with a total of 27h 40m narrowband and 1h 36m for the RGB shots of the stars. Meade ACF 12” f/8 telescope (focal 2400 mm) and ASI 2600 MM camera. The processing difficulties were first of all to compose a balanced color with the strong and quite different signals of the three channels. But the most difficult thing was to mark contrasts in the bright and complex body of the nebula. The photo field is 23'46"x16'27.4". The final look is dramatic, but it really must not be a good place to live.