"/>

无码少妇一区二区三区免费,妓院一钑片免看黄大片,国语自产视频在线,亚洲AV成人无码国产一区二区,激情久久综合精品久久人妻,日韩免费毛片,综合成人亚洲网友偷自拍,国内自拍视频在线观看,欧美熟妇性xxxx交潮喷,国产成人精品一区二免费网站

U.S. releases report to prepare for asteroid, comet hazards

Source: Xinhua    2018-06-21 03:51:40

WASHINGTON, June 20 (Xinhua) -- The White House on Wednesday released a report outlining its preparedness for asteroids and comets whose orbits come within about 48 million kilometers of Earth.

The report was written by the National Science and Technology Council under the White House to "address the hazard of near-Earth object (NEO) impacts" over the next 10 years, though no known NEOs currently pose significant risks of impact.

The United States should be prepared to "act independently through all phases that may occur during an impact scenario" to protect and preserve America's interests, despite the current international cooperation, according to the report.

The report said the country's ability to assess the overall risks of NEO impacts improved with more detection and better characterization of the total NEO population, but current observational capabilities were suited to only finding less than half of all 140-meter objects by 2033.

Larger NEOs greater than 140 meters have the potential to inflict severe damage to entire regions or continents, according to the report.

The U.S. space agency NASA and its partners have catalogued about one third of the estimated 25,000 near-Earth asteroids that are at least 140 meters.

The report set up goals such as improving NEO detection, developing technology of deflection and disruption missions, and increasing international cooperation.

It called for developing technologies and designs for rapid-response NEO reconnaissance missions and for NEO deflection and disruption missions.

Editor: yan
Related News
Xinhuanet

U.S. releases report to prepare for asteroid, comet hazards

Source: Xinhua 2018-06-21 03:51:40

WASHINGTON, June 20 (Xinhua) -- The White House on Wednesday released a report outlining its preparedness for asteroids and comets whose orbits come within about 48 million kilometers of Earth.

The report was written by the National Science and Technology Council under the White House to "address the hazard of near-Earth object (NEO) impacts" over the next 10 years, though no known NEOs currently pose significant risks of impact.

The United States should be prepared to "act independently through all phases that may occur during an impact scenario" to protect and preserve America's interests, despite the current international cooperation, according to the report.

The report said the country's ability to assess the overall risks of NEO impacts improved with more detection and better characterization of the total NEO population, but current observational capabilities were suited to only finding less than half of all 140-meter objects by 2033.

Larger NEOs greater than 140 meters have the potential to inflict severe damage to entire regions or continents, according to the report.

The U.S. space agency NASA and its partners have catalogued about one third of the estimated 25,000 near-Earth asteroids that are at least 140 meters.

The report set up goals such as improving NEO detection, developing technology of deflection and disruption missions, and increasing international cooperation.

It called for developing technologies and designs for rapid-response NEO reconnaissance missions and for NEO deflection and disruption missions.

[Editor: huaxia]
010020070750000000000000011105521372688601
夜色阁亚洲一区二区三区 | 国产在线观看91精品亚瑟| 日韩精品欧美高清区| 亚洲成a人片在线观看中| 国产精品视频优久久| 久久精品亚洲中文无东京热| 极品美女扒开粉嫩小泬| 亚洲午夜av久久久精品影院| 无码人妻h动漫| 国产乱人伦av在线无码| 亚洲韩国在线| 一边摸一边做爽的视频17国产| 秋霞午夜| 久久久久国产精品熟女影院| 妺妺窝人体色WWW看人体| 国产午夜精品理论片无删减| 欧美XXXX黑人又粗又长| 国产精品自拍露脸视频| 啦啦啦www在线观看视频播放| 国产精品中文一区二区| 综合久久青青草免费观看视频| 中文字幕无码不卡在线| 18禁黄污吃奶免费看网站| 夜夜爽77777妓女免费看| 亚洲成av人片天堂网无码| 日韩精品av一区二区三区| 日韩有码国产精品一区| 韩国无码AV片午夜福利| 又污又黄又无遮挡网站| 青草国产超碰人人添人人碱| 亚洲综合91社区精品福利| 国产精品不卡区一区二| 亚洲AV无码AV男人的天堂| 久久青青草原亚洲av无码| 久久精品国产字幕高潮| 精品视频在线观看免费无码| 亚洲香蕉毛片久久网站老妇人| 中国xxxx真实自拍| 伊人久久大香线蕉AV网| 亚洲视频在线观看免费视频| 亚洲熟妇av午夜无码不卡|