China's Chang'e-4 probe decelerates near moon

    Source: Xinhua| 2018-12-12 19:03:15|Editor: Liangyu
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    BEIJING, Dec. 12 (Xinhua) -- China's Chang'e-4 lunar probe decelerated near the moon Wednesday, completing a vital step on its way to make the first-ever soft landing on the far side of the moon, the China National Space Administration (CNSA) announced.

    After flying about 110 hours from earth, an engine on the probe was ignited when it was 129 km above the surface of the moon, in line with instructions sent from a control center in Beijing at 4:39 p.m., and then the probe slowed and entered an elliptical lunar orbit with the perilune at about 100 km at 4:45 p.m., said CNSA.

    The probe, including a lander and a rover, was launched by a Long March-3B carrier rocket last Saturday from the Xichang Satellite Launch Center in southwest China's Sichuan Province, opening a new chapter in lunar exploration.

    As the rocket was able to send the probe into orbit precisely as planned, the control center only adjusted the probe's orbit once on Sunday and also canceled two pre-planned orbit trimmings before the near-moon deceleration, CNSA said.

    Next, the control center will adjust the probe's orbit around the moon and test the communication link between the probe and the relay satellite "Queqiao," which is operating in the halo orbit around the second Lagrangian (L2) point of the earth-moon system.

    Afterward, the control center will choose a proper time to land the probe on the far side of the moon, according to CNSA.

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