Photography

thats due to how our eyes function in low light. in low light they are more sensitive to green light so deep space objects all appear greenish grey. the camera on teh other hand can show the natural colors.

as for techiniques this is my workflow
setup and align telescope to the north star
move to the object
i use a small device called an asair plus to control the shoot. I program in how long i want each individual exposure to be and how many. in this case its 5 minute exposures and 100 exposures.

after the exposures are done I take special calibration shots that will be combined with the images

I then use specialized software that combines all the images and the calibration frame. the reason you need so many exposures is to reduce noise. your are dealing with object that are very dim so you have to do a lot of processing to bring out the object. teh calibration frames help keep noise from overwhelming the object
the i use the software to do whats called nonlinear stretching. basically bring out teh nebula while keeping the background dark