日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

   

NASA losing hope of finding Mars probe

(AP)
Updated: 2006-11-22 09:16

On Monday night, NASA had hoped to catch a glimpse of the surveyor from the camera on the new Mars Reconnaissance Orbiter. But the orbiter failed to spot it.

Now NASA will try an even less likely search effort. Engineers will send a signal to the silent spacecraft, asking it to turn on a beacon on one of the two Mars rovers below. If the rover beacon turns on, NASA could figure out where the lost Mars Surveyor is, said project manager Tom Thorpe.

"While we have not exhausted everything we can do ... we believe the prospect for recovery of MGS is not looking very good at all," said Fuk Li, Mars program manager at NASA's Jet Propulsion Laboratory in Pasadena, Calif., which controls the probe. "We're still holding out some hope."

NASA will keep trying small-scale communications efforts. Experts believe the surveyor, which lost contact Nov. 2, probably developed a problem with a device that moves solar panels causing it to lose communication.

The entire Mars Global Surveyor program cost $247 million, including launch expenses and a decade of in-flight operations. NASA had just approved a two-year mission extension for $6 million a year.

Launched on Nov. 7, 1996, the probe gave scientists the best topographic map of any planet in the solar system, said Cornell University astronomer Steve Squyres, who didn't have an instrument on board the probe but was part of NASA's scientific review team.

The probe gave Earth its first detailed views of massive dust storms and gullies. It also revealed a new mystery about Mars: It once had a magnetic field.

The low-cost probe rose "from the ashes" of a dramatic Mars failure, Squyres said. In 1993, the $813 million Mars Observer disappeared just before getting to the planet. Most of that probe's instruments were built again and included on the Mars Global Surveyor.

Christensen called the global surveyor "a workhorse" because of its numerous and diverse scientific instruments.

"It really has opened up new vistas of Mars that we hadn't the foggiest notion of," said Arizona State University geologist Ron Greeley.


 12


Top World News  
Today's Top News  
Most Commented/Read Stories in 48 Hours
主站蜘蛛池模板: 亚洲人成在线免费观看 | 国产精品亚洲成在人线 | 天天舔天天操 | 国产精品久久影视 | 久久久久久久久免费视频 | 国产91在线精品 | 蜜桃视频网站在线观看 | 国产精品区二区三区日本 | 欧美激情区 | 成人爱爱视频 | 午夜精品久久久久久久99 | 特级a毛片 | 亚洲图片欧美激情 | 99精品一区二区三区的区别 | 夜色福利视频 | 欧美性猛交bbbbb精品 | 91麻豆国产在线 | 中文字幕av一区二区三区 | 亚洲成人免费观看 | 久久精品在线 | 在线一区| 欧美黑人一区二区 | 全部免费毛片在线播放高潮 | 一级特黄aaaaaa大片 | 日韩有码在线视频 | 久久99精品久久久久 | 国模大胆一区二区三区 | wwwav视频| 麻豆视频免费网站 | 粉嫩av性色av蜜臀av网站 | aaa成人 | 黄色一级大片在线免费看国产一 | 国产一区二区三区在线 | 精品久久伊人 | 在线观看视频你懂的 | 一级特黄aaa | 日韩网站视频 | 九九热在线免费观看 | 黄色一级大片在线免费看产 | 超碰在线影院 | 国产免费一区 |