Thank you very much @azfix :-)
Yes, the effort of time that such a picture need is quite immense. Also, the frustration when things don't work or when it's cloudy for weeks or months.
You're right, stacking can increase the details and lower the noise by an impressive amount.
If you have any questions do not hesitate to ask me, maybe I can give you an answer or explanation.
@terrylovejoy has some great articles about astrophotography.