The application is boring, because it does not show any results in the UI. You have to change this for the good, because the NASA scientists have great expectations from your work.
Now, we are going to show the results in the UI, using a BackgroundWorker combined with a delegate to work in the UI thread:
Form1(frmNebulaFinder) in the form designer.
private delegate void ShowImageCaller(Bitmap poBitmap);