China releases high-resolution pic of Mars' largest moon Phobos that looks like a potato

China released a high-resolution image of Mars' largest moon Phobos on Saturday, marking the two-year anniversary of the launch of its Mars probe Tianwen-1. In the picture, Phobos can be seen as an irregularly shaped object like a potato. Öpik, an impact crater on Phobos named after Estonian astronomer and astrophysicist Ernst Öpik, can also be seen.