The planet's gravitational pull slowed the spacecraft by 8,000 kilometers per hour for its eventual descent into orbit around Mercury in 2011.

由于星球引力的作用，会使太空飞船在2011年最终下降到水星轨道周围时的速度降为8000公里/小时。

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Rising on March 19, its exact full phase occurred within an hour of perigee, the closest point in the Moon's orbit to Earth.

3月19日那天的月亮，它最圆的相位发生在月球运行到近地点(月球轨道距离地球最近)附近一个小时以内的时间内。

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Traveling at 17, 500 miles per hour (5 miles per second)…we orbit the Earth every 90 minutes, with a sunrise or sunset every 45 minutes.

以时速17500英里/小时（5英里/秒）飞行，每90分钟我们就绕地球飞行一圈，就是说每45分钟就日升或日落一次。

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That was used to aid in the launch of four experimental satellites over the course of the 1960s and 1970s, the last of which was the first satellite to fly in the GPS 12-hour orbit and the first transmit GPS signals.

ENGADGET: GPS pioneer Roger L. Easton inducted into National Inventors Hall of Fame

Orbiting the Earth in a path that was inclined at 45 degrees to the equator, passing as close to 590 miles to the surface of the Earth, Telstar could be used for just twenty minutes out of each two and a half hour long orbit to relay signals between the America, France, and the United Kingdom.

FORBES: Telstar, the Fifty Year Old Hero of Communication