SMRTR Science & EngineeringJun 11, 2025Interesting Engineering

China plans daring satellite refueling test in orbit

SMRTR summary

China is set to conduct a critical orbital refueling test between two satellites in geostationary orbit. The demonstration, involving Shijian-21 and Shijian-25, aims to validate technology that could significantly extend satellite lifespans. If successful, Shijian-25 will transfer 313 lbs of hydrazine fuel to Shijian-21, adding eight years to its operational life. The US is closely monitoring the test as both nations compete for space dominance.

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