For 10 points, name these vehicles, such as Curiosity, which were built to explore a red planet.
One of these objects ignored the command "shutdown dammit until," leading to speculation that it was stuck in a reboot loop. Every one of these objects could instantly deploy an alpha proton x-ray spectrometer. One of these objects discovered a feature named Home Plate and became stuck in loose granular material near it. All of these objects were named for winners of (*) student essay competitions, including one that bears instruments like the CheMin and MARDI. Sojourner was the first successful one, preceding twin ones named Spirit and Opportunity. A site named for Ray Bradbury was the landing zone of the most recent one, which arrived in August 2012. For 10 points, name these vehicles, such as Curiosity, which were built to explore a red planet. 
One of these objects ignored the command "shutdown dammit until," leading to speculation that it was stuck in a reboot loop.
Mars rovers [prompt on rovers]