User: What is NASA's Lunar Reconnaissance Orbiter?
Assistant: The Lunar Reconnaissance Orbiter (also called LRO) is a NASA robotic space probe that launched in June 2009 to conduct a thorough study of the lunar surface, peer deep into the interior of the Moon, scan for evidence of past lunar impacts and volcanic activity, support long-term lunar surface robotic exploration, and support the future human exploration of the Moon.  The probe carries a wide variety of remote sensing instruments including cameras and spectrometers that allow it to make detailed scientific observations from a stable mapping orbit around the Moon.  The LRO mission has revealed many new details of lunar processes active today, and over time deepens our understanding of how the Moon was formed and evolved over billions of years.  The LRO mission also supports research related to future human exploration of the Moon, including search for water ice and historical lunar exploration sites, mineral resource assessment and discovery, detailed lunar gravitational models, and the evaluation of future human habitat locations. 

The LRO mission was completed in late 2017, and the LRO probe remains in a stable mapping orbit about the Moon.  As of the end of 2017 the LRO has completed its primary science mission, but is continuing to conduct valuable science and technology research for NASA through at least the end of 2020.