vehicle on a world other than Earth. After Opportunity's total odometry went over , the rover surpassed the total distance driven by the Apollo 17 Lunar Roving Vehicle. On July 28, 2014, NASA announced that Opportunity had driven further than any other vehicle on a world other than Earth. Opportunity covered over , surpassing the total distance of driven by the Lunokhod 2 lunar rover, the previous record-holder. On March 23, 2015, NASA announced that Opportunity had driven the full distance of a marathon, with a finish time of roughly 11 years, 2 months. In June 2018, Opportunity was caught in a global-scale dust storm and the rover's solar panels were not able to generate enough power, with the last contact on June 10, 2018. NASA resumed sending commands after the dust storm subsided but the rover remained silent, possibly due to a catastrophic failure or a layer of dust covering its solar panels. A press conference was held on February 13, 2019, that after numerous attempts to obtain contact with Opportunity with no response since June 2018, NASA declared Opportunity mission over, which also drew the 16-year long Mars Exploration Rover mission to a close. Spacecraft design The Mars Exploration Rover was designed to be stowed atop a Delta II rocket. Each spacecraft consists of several components: Rover: Lander: Backshell / Parachute: Heat Shield: Cruise Stage: Propellant: Instruments: Total mass is . Cruise stage The cruise stage is the component of the spacecraft that is used for travel from Earth to Mars. It is very similar to the Mars Pathfinder in design and is approximately 2.65 meters (8.7 feet) in diameter and tall, including the entry vehicle (see below). The primary structure is aluminium with an outer ring of ribs covered by the solar panels, which are about in diameter. Divided into five sections, the solar arrays can provide up to 600 watts of power near Earth and 300 W at Mars. Heaters and multi-layer insulation keep the electronics "warm". A freon system removes heat from the flight computer and communications hardware inside the rover so they do not overheat. Cruise avionics systems allow the flight computer to interface with other electronics, such as the sun sensors, star scanner and heaters. Navigation The star scanner (without a backup system) and sun sensor allowed the spacecraft to know its orientation in space by analyzing the position of the Sun and