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Any celebrations China's space officials kicked off after launching the nation's first female astronaut this month may have been dampened a few hours later by the news that another spacecraft an American military space plane had returned to Earth a world away.
Just hours after China's Shenzhou 9 capsule roared into space on June 16 with three astronauts aboard, including the nation's first female spaceflyer, Liu Yang the U.S. Air Force's robotic X-37B space plane touched down in California after 15 months orbiting Earth on a hush-hush mission.
The Air Force insists the X-37B is just testing out technologies for future satellites, but China has a deep suspicion of the vehicle and its activities, experts say.
"The X-37B is actually very controversial over there," said Brian Weeden, a technical adviser with the Secure World Foundation and a former orbital analyst with the Air Force. "They view it as a space weapon." [ Video: X-37B Lands at Vandenberg ]
Mysterious mission
The X-37B looks like NASA's now-retired space shuttle, only much smaller. The vehicle measures just 29 feet (8.8 meters) long and 15 feet (4.5 m) wide, with a payload bay about the size of a pickup truck bed. For comparison, two entire X-37Bs could fit inside the payload bay of a space shuttle.
The X-37B, also known as Orbital Test Vehicle-2 (OTV-2), launched on March 5, 2011, from Florida's Cape Canaveral Air Force Station. Its flight was the second-ever space mission for the X-37B program; the first was flown by OTV-2's sister ship, OTV-1.
OTV-1 stayed aloft for 225 days in 2010, well under the supposed 270-day orbital limit for the space plane. But OTV-2 smashed that limit, zipping around our planet for 469 days.
The X-37B's payloads and mission details are classified, so it's unclear exactly what OTV-2 was doing up there for so long. But Weeden thinks the Air Force's claim about technology-testing is broadly accurate.
Based on OTV-2's orbit which is also classified but was figured out by keen-eyed amateur astronomers Weeden reckons the space plane may have been staring down at Afghanistan and the Middle East with some brand-new spy gear, perhaps sensors that can see in wavelengths beyond the visible spectrum.
But China seems dubious of the Air Force's explanation, suspecting that X-37B missions might have a more aggressive intent.
"Industry analysts said the spacecraft could be a precursor to an orbiting weapon, capable of dropping bombs or disabling enemy satellites as it circles the globe," China's state-run Xinhua news agency wrote on June 17, a day after OTV-2 touched down at Vandenberg Air Force Base.
China views the X-37B "as a perfect example of the U.S. developing a space weapon program while stating in public that they're doing no such thing," Weeden told Space.com.
Room for cooperation?
China is an emerging space power, a country that's ramping up its spaceflight activities and capabilities.
The Shenzhou 9 capsule, for example, linked up with the unmanned Tiangong 1 module on June 18 and again on June 24, making China just the third country after the United States and Russia to pull off a manned space docking.
Shenzhou 9's mission, which is expected to wrap up by June 29, is viewed as a key step in China's plan to build a permanently staffed space station in Earth orbit by 2020. The country hopes to land a taikonaut on the moon sometime after that, and it's also developing its own satellite-navigation system so as not to be dependent on the U.S.-military-run GPS network.
China's suspicions about the X-37B may not make American officials too happy, for they've stated a desire to engage the Chinese more fully on space issues going forward.
"The U.S. says they're very interested in military-military dialogue with China on space activities, and further cooperation with China in a few different areas," Weeden said.
The Air Force's X-37B robotic space plane sits on the runway after landing at California's Vandenberg Air Force Base on June 16. The vehicle spent more than 15 months circling Earth on a mystery mission.
Just hours after China's Shenzhou 9 capsule roared into space on June 16 with three astronauts aboard, including the nation's first female spaceflyer, Liu Yang the U.S. Air Force's robotic X-37B space plane touched down in California after 15 months orbiting Earth on a hush-hush mission.
The Air Force insists the X-37B is just testing out technologies for future satellites, but China has a deep suspicion of the vehicle and its activities, experts say.
"The X-37B is actually very controversial over there," said Brian Weeden, a technical adviser with the Secure World Foundation and a former orbital analyst with the Air Force. "They view it as a space weapon." [ Video: X-37B Lands at Vandenberg ]
Mysterious mission
The X-37B looks like NASA's now-retired space shuttle, only much smaller. The vehicle measures just 29 feet (8.8 meters) long and 15 feet (4.5 m) wide, with a payload bay about the size of a pickup truck bed. For comparison, two entire X-37Bs could fit inside the payload bay of a space shuttle.
The X-37B, also known as Orbital Test Vehicle-2 (OTV-2), launched on March 5, 2011, from Florida's Cape Canaveral Air Force Station. Its flight was the second-ever space mission for the X-37B program; the first was flown by OTV-2's sister ship, OTV-1.
OTV-1 stayed aloft for 225 days in 2010, well under the supposed 270-day orbital limit for the space plane. But OTV-2 smashed that limit, zipping around our planet for 469 days.
The X-37B's payloads and mission details are classified, so it's unclear exactly what OTV-2 was doing up there for so long. But Weeden thinks the Air Force's claim about technology-testing is broadly accurate.
Based on OTV-2's orbit which is also classified but was figured out by keen-eyed amateur astronomers Weeden reckons the space plane may have been staring down at Afghanistan and the Middle East with some brand-new spy gear, perhaps sensors that can see in wavelengths beyond the visible spectrum.
But China seems dubious of the Air Force's explanation, suspecting that X-37B missions might have a more aggressive intent.
"Industry analysts said the spacecraft could be a precursor to an orbiting weapon, capable of dropping bombs or disabling enemy satellites as it circles the globe," China's state-run Xinhua news agency wrote on June 17, a day after OTV-2 touched down at Vandenberg Air Force Base.
China views the X-37B "as a perfect example of the U.S. developing a space weapon program while stating in public that they're doing no such thing," Weeden told Space.com.
Room for cooperation?
China is an emerging space power, a country that's ramping up its spaceflight activities and capabilities.
The Shenzhou 9 capsule, for example, linked up with the unmanned Tiangong 1 module on June 18 and again on June 24, making China just the third country after the United States and Russia to pull off a manned space docking.
Shenzhou 9's mission, which is expected to wrap up by June 29, is viewed as a key step in China's plan to build a permanently staffed space station in Earth orbit by 2020. The country hopes to land a taikonaut on the moon sometime after that, and it's also developing its own satellite-navigation system so as not to be dependent on the U.S.-military-run GPS network.
China's suspicions about the X-37B may not make American officials too happy, for they've stated a desire to engage the Chinese more fully on space issues going forward.
"The U.S. says they're very interested in military-military dialogue with China on space activities, and further cooperation with China in a few different areas," Weeden said.
The Air Force's X-37B robotic space plane sits on the runway after landing at California's Vandenberg Air Force Base on June 16. The vehicle spent more than 15 months circling Earth on a mystery mission.
