NASA's newest class of astronauts signed up knowing there'd be no U. S. rockets to launch them into space, at least not in the immediate future.

NASA的最新宇航员被告知并不会有美国的火箭送他们进入太空，至少短期内是这样的。

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NASA has cancelled its plans for a post-shuttle space vehicle. Until U.

美国航空航天局已经取消了建造后航天飞机时代太空飞行器的计划。

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"U," in a logarithmic way, means about 30 times louder than the ordinary noise of deep space.

用对数表示，这一信号强度相当于外太空的普通声音的30倍。

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The moon landing was seen as the high point of a U.S.space program fueled by a decade-long space race with the former Soviet Union.

VOA: standard.2009.07.16

The SR-71 has proven its value as a complementary system to U.S. space-based reconnaissance assets during the prolonged period from 1985 to 1987 when the United States was unable to place new satellites in orbit.

CENTERFORSECURITYPOLICY: Center for Security Policy | Congress Must Preserve A Vital Strategic Reconnaissance Capability �� The SR-71

Arguably, the Blackbird has greater survivability than most U.S. space-based reconnaissance systems.

CENTERFORSECURITYPOLICY: Center for Security Policy | Congress Must Preserve A Vital Strategic Reconnaissance Capability �� The SR-71

Launchspace ran the project, which drew more than 100 responses, as a promotion and to tap aging engineers with experience from the U.S.-Soviet space race of the 1960s, says director Robert Russo.

WSJ: A Cosmic Question: How to Get Rid Of All That Orbiting Space Junk?