The lander has the shape of a shallow bowl with a diameter of and a depth of . The cover of the lander is hinged and folded open to reveal the interior of the craft which holds a UHF antenna, the long robot arm, and the scientific equipment. The main body also contains the battery, telecommunications, electronics, and central processor, heaters, and additional payload items (radiation and oxidation sensors). The lid itself should have unfolded to expose four disk-shaped solar arrays. The lander package (including heat shield, parachutes, and airbags) has a mass of at launch but the actual lander was only at touchdown.