I have quite often viewed widefield astrophotographs with terrestial objects in frame, most commonly mountains.
Based on what I have learned on astrophotogrphy, it seems like these photographs must be heavily composited and edited.
Is this the case?
For example, to achieve these extremely detailed milky way photographs, you must use extremely long exposure times, where your tripod compensates for the earths rotation, to prevent star trail.
So in this case the camera would move during exposure with the stars, and blur the terrestial object.
Or in addition you can do take many frames, and then align and stack them in an image stacking software. But in this case, the images will be aligned based on the star locations based on earth rotation, and again the terrestial object will be blurred.
So the only way I can see these photographs being done, is by manually editing the terrestial and stars apart, and processing them separately, then compositing together.
Is this the most common way to acheive astrophotographs with terrestial objects in them, that are not blurred?