The Sun rotates on its axis once in about 27 days. This rotation can be seen by observing sunspots. This also means that Sunspots at the far side of the Sun can not be seen from Earth. With help from Helioseismology it's possible to create images of the far side and it's sunspots. Another interesting source is coming from Mars. The Mars rover Perseverance uses it's MastCam Z camera to take pictures of the Sun. Those pictures are not perfect but huge sunspots are visible and this can be interesting at the moment planet Mars is positioned towards the "far side" of the Sun.
For Mars Perseverance Images see this link.
I made a comparison between an image from the rover and the far side using helioseismology. The images are both made on December 22, 2023. We will see a week from now what it will bring.
