This image shows the three “stars” of Orion’s sword.
The great nebula in the centre is classified as M42. It is approximately 7500 million million miles away from the earth. The red colour is caused by light being radiated by hydrogen atoms. The blue colour is the reflection of light being radiated by the massive O-class stars at the core of the nebula. The dark patches are caused by interstellar dust blocking our view.
The smaller “Running Man Nebula” below it is classified as NGC1977.
Technical details – Canon 400D with 200mm lens, 11 × 120 second exposures @ ISO800. Dark subtraction, flat field application, registration, stacking and processing in IRIS. Total exposure time 22 minutes.
Here are some examples of my astrophotos as laminated prints