Leonard David's INSIDE OUTER SPACE

After releasing a test return capsule to Earth, the solar-powered service module first loitered at Earth-Moon L2 and then moved into orbit around the Moon.
Credit: China Space Website

China’s “service module” that is orbiting the Moon has conducted a series of tests – all in prelude to a robotic lunar sample mission eyed for 2017.

According to a statement of the State Administration of Science, Technology and Industry for National Defense (SASTIND), the orbiter modulated its speed, height, and overall orbit around the Moon.

Those tests were completed February 6-7, SASTIND reported.

Space ballet: L2 to lunar orbit

The service module used in the tests was part of China’s experimental Moon probe that was launched on Oct. 24, 2014, a craft that made a circumlunar trek during an eight-day mission. On its flight back to Earth, the service module ejected a return capsule on Nov. 1, with the capsule parachuting to Earth that same day.

After release of the capsule, the service module made its way to the Earth-Moon Lagrangian (L2) position. The craft completed three circuits around that point prior to heading for lunar orbit. It then performed a set of braking maneuvers that nudged itself into lower and lower orbits around the Moon.

China mooncraft jumps from Earth-Moon L2 position into Moon orbit.
Credit: CMSE

Future mission

Experience gained during the service module’s flight is intended to sharpen the skills of ground controllers to undertake a lunar sample mission projected for 2017.

China’s Chang’e 5 mission is slated for 2017 and will land, collect, and return to Earth lunar samples.
Credit: China Space Website

That mission, China’s Chang’e 5, would be a sample return effort, entailing a soft landing on the Moon, scooping up several pounds of rock and soil, then rocket those specimens off the lunar surface for transport back to Earth.

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