Deep-Sky Mosaicking ALIGNMENT STEP 1 Bottom left: The StarAlignment process in PixInsight requires two passes in order to register one panel to the other. The first step is to make a template by selecting one of the panels as the reference image and then dragging the New Instance triangle (arrowed) onto the other panel. In a moment, the program generates a composite of the two panels stitched together though not perfectly blended together (right). This template is used in the next step. STEP 2 Bottom right: Next, select your template image as the Reference image (1) and change the Working mode to Register/ Match Images (2). Choose a directory where the registered images will be saved (3) and then run the process by clicking the blue circle at bottom left of the screen (4). 1 2 3 4 64 FEBRUARY 2024 * SKY & TELESCOPE