It is orbiting a star called Gliese 876, 15 light years from Earth, with an orbit time of just 1.94 Earth days.
这颗行星围绕着一颗名为“格里斯876”的恒星运转，该恒星距地球15光年，绕轨道运行一周的时间约为地球上的1.94天。
They found that the shuttle's orbit time could be extended by 25 days, and reckoned that, with a second shuttle on stand-by in case crew needed rescuing, the risk was acceptable.
他们发现太空飞梭的轨道时间可以延长25天，并且一致认为：如果在第二个太空飞梭能够辅助于左右，以防宇航员需要救助，那么这一任务的危险性还是可以接受的。
The shape of this orbit isn't consistent; it varies over time, over a period of about a thousand years.
轨道的形状并不是始终如一的；它会随时间变化，变化周期为一百年左右。
Also that velocity, v, in that equation number five will also change with time because it's an elliptical orbit.
同样的，第五个方程序，中的速度同样，会随时间改变，因为这是椭圆形轨道。
The duration of the dip tells the size of the planet, and the time between the light dips tells the length of the planet's orbit.
黯淡的持续时间说明了该行星的大小，而其亮度下降的时间间隔说明了行星轨道的长度。
That moon would have interacted with a disk of gas surrounding Saturn at the time, dragging its orbit closer and closer.
这颗卫星在那时可能与土星外的气态光环发生了作用，造成它的轨道越来越靠近土星。
When the appointed time came to blast Yuri Gagarin into orbit, he simply pushed a button that completed the ignition circuit and watched the motors start.
当推送尤里·加加林进入轨道的预定时刻来临之际，他只是简单地按下一个按钮闭合点火电路并看着发动机启动。
The New Year is based on an arbitrary time, in the orbit of theplanet we happen to live on, which is statistically likely to be one ofmany we could’ve inhabited.
新年其实是个随意的时间，它基于我们生活的这个星球的轨道运行，有很多可能性。
The last team to visit that U.S. stationset a world record at the time for longest stay in orbit, 84 days.
最后一批进入美国空间站的宇航员创造了一项最长在轨时间（84天）的世界纪录。
The same logic applies to satellites: the bulkier the satellite, the more time it takes to design and build, and the more expensive it is to put into orbit.
同样这个逻辑也适用于卫星，卫星越大，就需要越多的时间去设计和制造，送入太空就需要更多的资金。
Space probes parked in orbit round the sun might lie dormant yet intact for an immense period of time.
停在太阳周围轨道的太空探测器也许依然完好。
The idea was two decades ahead of its time, and helped to attach his name to the geostationary orbit above the equator.
这个想法领先于那个时代20年，环赤道同步静止轨道也因此以他的名字命名。
At the worst, these will amount to twenty hours-the time it takes a radio signal to span the orbit of Pluto, the outer-most planet.
最糟糕的情况也就是20小时，即无线电信号越过最远的冥王星的轨迹的时间。
For this reason, it is possible that HD 240237, BD + 48 738, and HD 96127 once might have had more planets in orbit, but that these planets were consumed over time.
因为这个原因，HD 240237BD + 48738和HD 96127很可能拥有更多行星在轨道上，但随着时间的推移，这些行星会被毁灭。
Messenger and is using gravity from Earth and Venus to slightly alter its orbit over time before it moves into Mercury's orbit in March 2011.
预计信使号飞船将于2011年3月进入水星的运行轨道，在这之前它要借助来自地球和金星的引力，稍微调整一下自己的轨道。
"For the first time in history, a scientific observatory is in orbit about our solar system's innermost planet, " he said.
Sean Solomon说：“这是历史上第一次在太阳系最内的行星的轨道上进行科学观测。
The Almaz spacecraft represent a 1970s throwback to a time when the Soviets envisioned human crews flying into orbit to secretly spy on enemies under the cover of being civilian research stations.
阿尔马兹太空游仿佛将人们又带回到了20世纪70年代。 那一时期苏联经常以民用研究的名义利将乘坐宇航员的阿尔马兹轨道舱发射到空间轨道上以监视敌方动向。
The spacecraft relayed information to confirm it entered Vesta's orbit, but the precise time this milestone occurred is unknown at this time.
航天器发回的信息证实了它进入了维斯塔的轨道，但是这一重大事件确切的时间却无法知晓。
So to go around this circular orbit will take the same amount of time as to go around this one, and that is by no means obvious.
沿着圆形轨道运行的，时间和沿着椭圆轨道，所花费的时间是一样的，这决非显而易见的。
But now scientists claim that the regularity of the mass extinctions actually disproves the Nemesis theory because its orbit would have changed over time as it interacted with other stars.
然而现在科学家称大灭绝的周期性实际上证明涅墨西斯星球理论是错误的，因为随着时间的推移，在和其他星球的相互作用下，星球的运行轨迹会发生改变。
Also, it needs more time to detect exoplanets that orbit further away from their stars.
同时，他们还需要更多的时间来观测那些离母星更远的外行星。
Discovery had enough power and supplies to stay in orbit until Wednesday, but NASA was holding out that option only if a technical problem arose that needed time to be resolved.
“发现”号有足够的能量和供给维持飞行到周三，但只有当需费时解决的技术问题出现时，NASA才会考虑这种选择。
Millions of South Koreans watched live coverage of the launch, hoping to witness the first time their country had put a satellite into orbit from its own territory.
数百万韩国民众都观看了此次发射的现场直播，希望能够见证他们的国家首次在本土将卫星送入轨道。
As time goes on, the stars' outer layers orbit each other hundreds of times and begin to form into one.
随着时间的推移，在行星的外层空间之间相互运行了成百上千次后，他们开始形成为一体。
While users save time and effort, Baidu keeps them in the orbit of its advertisers for longer.
在帮助用户省时省力的同时，百度能够让用户在其广告客户提供的内容中停留更长时间。
Right now, the Moon's rotation rate, and the time it takes to orbit Earth are the same.
现在，月球的自转速度与绕地球公转速度是一样的。
And we may have to wait a very long time for a planet like Earth to orbit its star twice: Alien astronomers would have to wait two years to observe our planet transiting the sun twice.
而且，我们可能需要等待一个很长的时间才能等到一个类地行星第二次围绕它的恒星作轨道运行：外星系的天文学家们要花两年的时间才能看到两次我们的地球绕太阳运行。
By the time engineers receive word the engine firing has begun, the engine should have already switched off, with the spacecraft in orbit.
等到工程师收到发动机开始启动的消息时，发动机应该已经熄火了，而朱诺号应该也应进入轨道。
The Sun may seem too close for a brief time until the Earth returns to her orbit.
在一个短时期内太阳将看起来太过于接近，直到地球回归其自身轨道。
The Sun may seem too close for a brief time until the Earth returns to her orbit.
在一个短时期内太阳将看起来太过于接近，直到地球回归其自身轨道。
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