Almost 2 years ago, two of five THEMIS satellites were boosted from their orbits around Earth toward the moon. The first transitioned into a lunar orbit on June 27, while the second is destined to arrive on Sunday, July 17, to begin mapping the moon’s surface magnetic fields and magnetic environment in 3-D. The probes, renamed the ARTEMIS mission, will also look for evidence of plasmoids produced by magnetic reconnection in Earth’s magnetotail.