To avoid the delays associated with transferring data between Earth and Mars, NASA scientists have developed software that allows the rovers roaming Mars to analyze on the fly.The Jet Propulsion Lab (JPL) in Pasadena, CA built a platform called Onboard Autonomous Science Investigation System (OASIS). OASIS allows the rover to perform image and data analysis and react to the results without human intervention.To supplement the efforts of OASIS, Autonomous Exploration for Gathering Increased Science (AEGIS) was uploaded to Opportunity in December of 2009. Prior to the introduction of AEGIS, images of the Martian surface were transmitted to Earth, analyzed and then translated into geological targets. The target would then be uploaded to the rover. The time associated with data transfer and the near archaic processing speeds mandated by the limitations of space platforms meant that this entire process took days to accomplish. Often, by the time the operations team received the images the rover had already moved far beyond the location. In short, there was no way to react in real-time.Since the advent and implementation of AEGIS, Opportunity has the ability to complete onboard reasoning. The seven-step process of determining what may be “interesting” begins with AEGIS prioritizing targets within a wide-field of vision. Rocks within the field are analyzed against the target parameters sent to the rover by the craft’s sequencing team at JPL. Attributes such as brightness, shape and size are judged. Those objects that possess attributes deemed as “interesting” are inspected further as are objects found in close proximity to the “interesting” object.