This paper describes the attitude control method for overturning prevention for a lunar planetary lander which uses a semi-active damper on the landing leg. In order to achieve safe landing on uneven terrain especially a sloped ground. a novel landing gear system is required. The landing leg with variable damping is one of the solutions for touchdown without overturning. https://www.bekindtopets.com/save-now-Rx-Chorulon-HCG-for-Cattle-save-extra/