SIMPLEx Small Satellite Concept Finalists Target Moon, Mars and Beyond

“I think the thing that impressed me the most was the lunar sunrises and sunsets,” said Apollo 8 astronaut Bill Anders as he described his impressions of the Moon from about 60 miles. “These in particular bring out the stark nature of the terrain, and the long shadows really bring out the relief.” This oblique photograph looks northwest into the Sea of Tranquility, the site where Apollo 11 would land seven months later. (Credits: NASA)

WASHINGTON (NASA PR) — NASA has selected three finalists among a dozen concepts for future small satellites. The finalists include a 2022 robotic mission to study two asteroid systems, twin spacecraft to study the effects of energetic particles around Mars, and a lunar orbiter to study water on the Moon. At least one of these missions is expected to move to final selection and flight.