ets">
                <planets>
                    <planet>
                        <name>Mercury</name>
                        <description>
                            Mercury (0.4 AU) is the closest planet to the Sun and the smallest planet (0.055 Earth
                            masses). Mercury has no natural satellites, and its only known geological features besides
                            impact craters are lobed ridges or rupes, probably produced by a period of contraction early
             