Enlarge / A Long March 3B rocket lifts off from the Xichang Satellite Launch Center in 2018.STR/AFP via Getty Images

The Long March 3B rocket is one of China's oldest active and most reliable boosters, with more than five dozen successful launches. On Thursday, however, the rocket failed when it attempted to launch an Indonesian telecommunications satellite, Nusantara Dua, from the Xichang Satellite Launch Center.

Although ground-based observations showed the first and second stages of the rocket performing nominally, apparently something went wrong with the final stage needed for a boost into geostationary transfer orbit. Chinese media reports indicate that the third stage failed due to unspecified reasons and that the 5.5-ton satellite fell back into Earth's atmosphere.

This is China's second failure in eight launch attempts this year, and the second in less than a month. On March 16, the launch of the relatively new Long March 7A failed to reach orbit after lifting off from Wenchang Spacecraft Launch Site.

It is not clear what effect these two high-profile failures will have on China's launch industry, which had planned to conduct more than 40 launch attempts this year, including a highly anticipated Mars mission in July. This HX-1 spacecraft is slated to fly on the country's most powerful booster, the Long March 5. That rocket has launched just three times, with two successes.

Indosat's Nusantara Dua was planned as a replacement for another telecommunications satellite in geostationary orbit, Palapa-D.

Ironically, that satellite also launched on a Long March 3B rocket, back in 2009, and that booster also had a problem with its third stage. In the case of the 2009 lRead More – Source

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