china's chang'e-4 probe touched down on the far side of the moon thursday, becoming the first spacecraft soft-landing on the moon's uncharted side that is never visible from earth.
中国嫦娥四号探测器于周四在月球背面着陆，成为在月球背面软着陆的第一台航天器。
the probe comprised of a lander and a rover, touched down at the preselected landing area at 177.6 degrees east
1 and 45.5 degrees south
2 on the far side of the moon at 10:26 a.m. (beijing time), the china national space administration (cnsa) announced.
with the communication assistance of the relay satellite queqiao, meaning
3 bridge, the probe sent back the first-ever close-up photograph of the moon's far side, opening a new chapter in lunar exploration.
after the beijing
4 control center sent an order at 10:15 a.m., the chang'e-4 probe, launched on dec. 8, 2018, began to
5 from 15 km above the moon with a variable thrust engine being ignited, said cnsa.
the chang'e-4's relative
6 to the moon was lowered from 1.7 km per second to close to zero, and the probe's attitude was adjusted at about 6 to 8 km above the lunar surface.
at 100 meters up, the probe
7 to identify obstacles and measured the slopes on the surface. after avoiding the obstacles, it selected a
8 flat area and
9 10 and slowly.
then the probe landed in the von karman
11 in the south pole-aitken basin.
during the
12 process, a camera on the probe took photos of the landing area.
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