Now, what I would have expected to see what the traces of planets there called "unexplored", giving me the info of size, location but not composition.
You won't see any until you scan with FSS, so a quick run down of my setup and procedure.
Go to control panel, the FSS section, select a button to start FSS, select options to scroll around within FSS and select zoom in and out buttons.
My setup is Joystick 7 to start and exit FSS. Hat control to scroll around, or you can use joystick but I find hat control convenient. Left top joystick button to zoom in, right to zoom out. You can also set a button to target current zoomed object, good for checking out ELW and NSP. Set tuning controls, I use two methods numbers 0 and 2 for left right quick scrolling and joystick twist for fine tuning.
So jump in, scoop, honk while scooping. Once clear of danger zone throttle to zero, you must do that to use FSS, press FSS activate button. You will see number of objects top right and in some cases a line for stellar equator, you may need to move around a bit to find it. If it's a simple you scan along that line until you see a blue blob, use the tuning controls to focus in until you see a white circle, then zoom in, if it's a double circle you may need to do the same again because there will be two or more bodies, you'll get the hang of that easily enough. Repeat until all bodies found or you get back to the start.
From there if still missing bodies you need to search around the place. Set pointer to center of star, scroll up/down, left/right, then both diagonals until all bodies found, then all done.
After that all bodies will be visible on system map, investigate or scan anything interesting like ELW, NSP etc.