On Friday, the bottom part of a rocket
that had been launched just minutes earlier descended toward what looked
like a stubby drilling derrick floating in the South China Sea. As the
rocket stage, known as a booster, slowed almost to a stop and precisely
maneuvered into the center of the structure, a grid of wires gently
closed around it.
It was a
remarkable success for a Chinese government-owned space company. On the
inaugural flight of its new Long March 10B rocket, it nailed a critical
step toward China’s goal of developing reusable rockets.
The
wire-catching technique was also novel. By snagging the booster as it
hovered above the platform, engineers eliminated the need to equip the
booster with landing legs.
The
milestone offered further evidence that China’s space industry, while
still trailing that of the United States, may be closing the gap.
Reusing rockets instead of discarding them after one launch enables a
quicker pace of operation — more like jetliners — and reduces costs for
the launching of satellites and other payloads.
But Todd Harrison, a senior fellow at
the American Enterprise Institute, a think tank in Washington, was not
overly impressed, noting that Elon Musk’s rocket company, SpaceX, first
landed a booster more than 10 years ago with its Falcon 9 rocket. The
Long March 10B is roughly comparable in size and capability to the
Falcon 9.
“It means they are making
progress,” Mr. Harrison said of the Chinese, “but not necessarily
catching up to where U.S. capabilities are today.”