首个阿耳特弥斯月球探测器进入预定轨道-凯发k8官网

首个阿耳特弥斯月球探测器进入预定轨道

文章来源：未知文章作者：enread 发布时间：2011-06-30 05:17 字体： [ ]　

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the first of two artemis ("acceleration, reconnection, ¹ and electrodynamics of the moon's interaction with the sun") spacecraft is now in its lunar orbit. on june 22, artemis p1 began firing its thrusters（推进器） to move out of its kidney-shaped "libration" orbit on one side of the moon, where it has been since january. three successive ²（军事演习） were used to kick the spacecraft out of its orbit and send it on a ³（轨道） toward the moon.

it continued on that path until june 27 at 10:04 a.m. edt when the spacecraft was about 2,400 miles from the moon. at that point, flight engineers at uc berkeley issued the first commands to move it into orbit around the moon. two more maneuvers helped fine-tune the position, and as of 12:30 p.m. edt, artemis p1 is now in lunar orbit.

this is the ⁴ of a complex, two-year journey that relied predominantly on gravity boosts and used ⁵ fuel. the path from its orbit around earth to the moon was developed and orchestrated（安排） by engineers at the nasa's goddard space flight center in greenbelt, md., nasa's jet propulsion lab in pasadena, calif., and university of california at berkeley.

the engineers will watch the artemis p1 orbit closely over the next few days in case additional adjustments are required. engineers are set to move the second spacecraft, artemis p2, into position on july 17.

artemis is the first mission ever to orbit the moon's lagrangian points – points on either side of the moon where the moon and earth's gravity balance ⁶. it is also the first to attempt to move from the lagrangian to lunar orbit.

the artemis mission uses two of the five in-orbit spacecraft from another nasa heliophysics constellation（星座，星群）of satellites called themis that were launched in 2007 and successfully completed their mission in 2010. the artemis mission allowed nasa to repurpose two in-orbit spacecraft to extend their useful science mission.

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收听单词发音

1
n.喧嚣，狂暴，骚乱，湍流
参考例句：
the turbulence caused the plane to turn over.空气的激流导致飞机翻转。 the world advances amidst turbulence.世界在动荡中前进。

2
n.策略，谋略，花招( maneuver的名词复数 )
参考例句：
he suspected at once that she had been spying upon his maneuvers. 他立刻猜想到，她已经侦察到他的行动。来自辞典例句 maneuvers in guizhou occupied the reds for four months. 贵州境内的作战占了红军四个月的时间。来自辞典例句

3
n.弹道，轨道
参考例句：
it is not difficult to sketch the subsequent trajectory.很容易描绘出它们最终的轨迹。 the path followed by a projectile is called its trajectory.抛物体所循的路径称为它的轨道。

4
n.顶点；最高潮
参考例句：
the space race reached its culmination in the first moon walk.太空竞争以第一次在月球行走而达到顶峰。 it may truly be regarded as the culmination of classical greek geometry.这确实可以看成是古典希腊几何的登峰造级之作。

5
adj.尽可能少的，最小的
参考例句：
they referred to this kind of art as minimal art.他们把这种艺术叫微型艺术。 i stayed with friends, so my expenses were minimal.我住在朋友家，所以我的花费很小。

6
adv.完美地，无可非议地，彻底地
参考例句：
the witnesses were each perfectly certain of what they said.证人们个个对自己所说的话十分肯定。 everything that we're doing is all perfectly above board.我们做的每件事情都是光明正大的。