——阿诺德·斯班塞·琼斯爵士，英国皇家天文学家，1957(2周后斯巴尼克人造卫星环绕地球)。
Sir Harold Spencer Jones, Astronomer Royal of the UK, 1957 (two weeks later Sputnik orbited the Earth).
在荷兰天文学家克里斯蒂安·惠更斯发现土星环以及第一颗已知土星卫星——土卫六“泰坦”之后，这颗行星逐渐成为天文学家的关注焦点。
The planet was only just beginning to come into focus, in the metaphorical sense: The Dutch astronomer Christiaan Huygens had just recently revealed Saturn's rings and its first known moon, Titan.
天文学家才刚刚找到几颗有可能适于居住的行星。美国国家航空航天局开普勒卫星很快就能发现得更多——也许其中一些与地球更为相似。
Astronomers are just beginning to find potentially habitable worlds. And NASA's Kepler satellite should turn up more soon-including, perhaps, some that look even more like Earth.
这一直让天文学家们的挑战，记录恒星的质量直接，但一项新研究表明一种新方法来试试吧-只要行星(和卫星)使长。
It's always been a challenge for astronomers to record the mass of a star directly, but a new study suggests a novel way to try it -as long as the planets (and moons) align.
这些天文学家们很善于排除可能被误以为是近地天体的人造卫星，宇宙射线产生的电火花，以及其他掠过天空的物体。
The astronomers are skilled at ruling out man-made satellites, electronic sparks from cosmic rays and other streaking objects that could be mistaken for an NEO.
这一直让天文学家们的挑战，记录恒星的质量直接，但一项新研究表明一种新方法来试试吧-只要行星(和卫星)使长。
It's always been a challenge for astronomers to record the mass of a star directly, but a new study suggests a novel way to try it - as long as the planets (and moons) align.
上月，天文学家宣称已发现最类似地球卫星——其大小为地球的三倍，表面为岩石覆盖，距离其环绕的恒星20光年。
Last month, astronomers announced the discovery of the most Earth-like planet ever found - a rocky world three times the size of our own world, orbiting a star 20 light years away.
天文学家曾经假设它们总是像其它银河系引力束缚下更小的卫星星系的星云一样，在它们目前近似地距离上围绕银河系的轨道运行。
Astronomers once assumed they had always orbited the Milky way at approximately their current distances, like the other, lesser satellite galaxies in the Milky way's gravitational thrall.
天文学家于上周四在美国《科学》杂志发表的报告中称，他们发现了月球上出现了一些之前未被勘测到的地貌，这些地貌表明地球的这颗卫星正在缩小——尽管幅度很小。
Astronomers reporting on Thursday in the us journal Science said they had found previous undetected landforms which indicate that Earth's satellite has been shrinking... albeit by only a tiny amount.
不过在其他行星系统中，地球大小或者稍大一些的卫星是完全可能存在的，美国宾州大学伊利校区(PennState Erie)的天文学家戴伦·威廉斯(Darren Williams)说。
But in other planetary systems, moons Earth-size or larger are not out of the question, says astronomer Darren Williams of Penn State Erie.
该技术在射电天文学、卫星雷达和机载雷达上均获得了巨大成功。
The technique has been highly successful in radio astronomy, and in both satellite and aircraft borne radar.
天文学家可能很快就能得到支持他们假设的观测结果，他们的假设是在太阳系外的宇宙存在像月球一样的卫星。
Astronomers may soon have observations to back up their hypotheses about lunar companions to extrasolar worlds.
这种断裂结构一度让天文学家们感到迷惑不解，直到2004年卡西尼号飞越这颗卫星时拍下了一系列的照片，天文学家才发现原来这些结构是地质活动生成的巨大悬崖。
The fractures puzzled astronomers until Cassini flew by in 2004 and revealed that they are large cliffs created by tectonic activity.
通过这个方法，天文学家发现天王星有五个类似于土星的光环。这颗行星也有五个卫星。
By this method, astronomers discovered that Uranus has five rings which are similar to Saturn's. The planet also has five moons.
在1987年2月23日，天文学家获得了次佳的机会：银河系的卫星星系“大麦哲伦云”中，发生了一次超新星爆发。
On February 23, 1987, astronomers got the next best thing: a supernova in one of the Milky Way's satellite galaxies, the Large Magellanic Cloud.
天文学家认为，土星的卫星在光环的形成中扮演着重要角色。
Astronomers believe that Saturn's moons play a fundamental role in sculpting its elaborate ring system.
哈勃太空望远镜最近发现了第四颗绕行冥王星的卫星。天文学家们暂时把它命名为P4。该是迄今为止发现的围绕这颗冰雪覆盖的矮行星的最小的卫星。
Hubble recently showed a fourth moon orbiting Pluto. Astronomers temporarily named it P4. The moon is the smallest to be discovered around the icy dwarf planet.
旅行者一号拍摄的罗卫星的照片使天文学家感到了真正的兴奋。
It was Voyager One's Pictures of Io that really excited astronomers.
哈勃望远镜最近发现了冥王星第4颗卫星，天文学家暂时称之为冥卫四(P 4)，它是环绕冥王星的最小的卫星。
Hubble recently showed a fourth moon orbiting Pluto. Astronomers temporarily named it P4. The moon is the smallest to be discovered around the icy dwarf planet.
在1987年2月23日，天文学家获得了次佳的机会：银河系的卫星星系大麦哲伦云中，发生了一次超新星爆发。
On February 23, 1987, astronomers got the next best thing: a supernova in one of the Milky Way 's satellite galaxies, the large Magellanic cloud.
根据国际天文学联合会的定义，“矮行星”应该有一条环绕太阳的轨道，它不能清除其轨道附近的其它天体，而且不是一颗卫星。
According to IAU, a "dwarf planet" should have an orbit around the Sun. It will not have a clear neighborhood around its orbit, and must not be a satellite.
天文学家已经证实，美国航空航天局的威夫特卫星拍摄到的一颗爆发星是天文望远镜探测到的最远的宇宙星体。
Astronomers have confirmed that an exploding star spotted by Nasa's Swift satellite is the most distant cosmic object to be detected by telescopes.
本文介绍了由地球人造卫星进行天体测量的两项计划，并提出了它们对天体测量学、天体物理学和恒星天文学的影响。
Two projects for astrometry from Earth satellites are described and their impact on astrometry, astrophysics and stellar astronomy are outlined.
难道真的美国宇航局和SETI天文学家探测木星最大的卫星，木卫三，一，在1980年的外星人信号？
Did NASA and SETI astronomers actually detect an alien signal from one of Jupiter's largest moons, Ganymede, during the 1980's?
天文学家们估计，WAPS - 17行星有可能和一颗较大的卫星又一次近距离接触，引力相互作用就好像弹弓，将WASP - 17放入奇怪的轨迹。
WASP-17 likely had a close encounter with a larger planet, and the gravitational interaction acted like a slingshot to put WASP-17 on its odd course, the astronomers figure.
最新消息：美国宇航局和SETI天文学家发现外星人的无线电信号的人工卫星源于木卫三最大，一木星的。
Breaking News: NASA and SETI Astronomers detect an artificial alien radio signal originating from Ganymede, one of Jupiter's largest moons.
天文学家也通过卫星，在它的大气层里发现了氧原子和二氧化碳的存在，这些都是对生命来说，都是基本的。
And astronomers have found that oxygen atoms and carbon dioxide, which are fundamental to life, exist in its atmosphere through satellites.
沃斯·托克湖也引起天文学家的兴趣，因为湖水被认为与木星卫星欧罗巴上，几公里厚冰层覆盖的海水类似。
Lake Vostok also interests astronomers because its waters are thought to be similar to those on Europa, a moon of Jupiter that has an ocean covered with ice that is kilometres thick.
这个卫星被直接降落在一个被叫做“曼哈顿”的区域，这个名字是根据伟大的天文学家曼哈顿教授取的，他是第一个用他的20000光年望远镜发现的。
The satellite was directed into an area known as Manhattan (named after the great Venusian astronomer Prof. Manhattan, who first discovered it with his telescope 20,000 light years ago.
这个卫星被直接降落在一个被叫做“曼哈顿”的区域，这个名字是根据伟大的天文学家曼哈顿教授取的，他是第一个用他的20000光年望远镜发现的。
The satellite was directed into an area known as Manhattan (named after the great Venusian astronomer Prof. Manhattan, who first discovered it with his telescope 20,000 light years ago.
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