China will launch relay satellite for lunar probe Chang & # 39; e-4

China plans to launch a space relay satellite next Monday, May 21 for the Chang-e-4 lunar probe scheduled later this year.

The Chang-e-4 lunar probe will make the first soft landing on the other side of the moon. However, direct communication with the far side of the Moon is not possible, which is one of the many challenges of the mission of the lunar probe Chang & # 39; e-4.

The relay satellite, called Queqiao, will be responsible for transmitting the signals between the earth station and the landing module and Rover Chang & e-4.

Retransmission satellites are communication satellites that can provide data retransmission and spacecraft monitoring services, improving the efficiency and emergency capability of several satellites. They also allow the transmission of data from terrestrial and environmental resources satellites in real time.

The Chang & # 39; e-4 probe will also carry scientific loads for four countries, including the Netherlands and Germany.

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