但是天文学家辛苦分析这些观测金星凌日的探险活动的结果。
But astronomers laboured hard to analyse the results of these expeditions to observe Venus transits.
几个世纪以来，金星凌日吸引了探险家和天文学家们汇聚到地球的四个角落。
For centuries, transits of Venus have drawn explorers and astronomers alike to the four corners of the globe.
2004年6月，金星的投影穿越太阳表面，这是122年一遇的天象，被称为“凌日”。
June 2004 saw the first passage, known as a "transit", of the planet Venus across the face of the Sun in 122 years.
1677年11月，哈雷在南太平洋荒凉的圣赫勒拿岛上观测到了水星（最靠近太阳的行星）的凌日现象。
In November 1677, Halley observed a transit of the innermost planet, Mercury, from the desolate island of St Helena in the South Pacific.
勒让蒂乘坐一艘法国军舰横穿印度洋逃亡时看到了一次壮观的凌日现象，但船剧烈摇晃，使任何准确观测的尝试都以失败告终。
Fleeing on a French warship crossing the Indian Ocean, Le Gentil saw a wonderful transit, but the ship's pitching and rolling ruled out any attempt at making accurate observations.
那个数值与今天雷达测定的149,597,870公里相当接近，就当时来说准确度很合理，雷达在精度上已经取代了凌日和其他所有方法。
Reasonably accurate for the time, that is quite close to today's value of 149,597,870 km, determined by radar, which has now superseded transits and all other methods in accuracy.
正如希瑟·库珀和奈杰尔·亨贝斯特解释的那样，凌日帮助我们形成了对整个宇宙的看法。
Transits have helped shape our view of the whole Universe, as Heather Cooper and Nigel Henbest explain.
因此，2004年6月的金星凌日与其说是一个重要的科学事件，不如说是一个天文奇观。
June 2004's transit of Venus was thus more of an astronomical spectacle than a scientifically important event.
从地球看去，行星的凌日的情况约为百分之一。
Viewed from Earth, planets transit their stars only about 1% the time.
这是因为这次的金星凌日不会经常发生。
那么2004年六月的金星凌日对你的影响如何呢？
事实上，凌日时间变化可以提供有关行星质量的信息。
In fact, such transit timing variations provide information on the masses of the planets.
金星凌日也会对你如何表现自己与别人如何看待你产生一定影响。
The Venus Transit is also going to do a number things in terms of how you present yourself to others and how others see you.
可能由有较长轨道的行星引起的成百上千的闪光已被发现，但尚未证实是凌日。
Hundreds of flickers that might have been caused by planets with longer orbits have been seen, but have not yet been confirmed as transits.
金星凌日并不像日食那么壮观，日食是由月球通过地球和太阳中间造成的。
A transit of Venus is not nearly as spectacular as a solar eclipse, caused by the passage of the moon between Earth and the sun.
天文学家推断系外行星存在的手段有好几种，美国宇航局的开普勒项目使用的是凌日法。
While there are a number of different ways that astronomers infer the existence of exoplanets, NASA's Kepler mission USES what's known as the transit method.
要让这颗行星的状态从“候选”到“证实”，“开普勒”小组必须确认三次“行星凌日”的过程。
The Kepler team had to wait for three passes of the planet before upping its status from "candidate" to "confirmed".
因为金星凌日很难用肉眼看见，在人类历史上大部份的时期，人们都不知道有这样的事情。
Because a transit of Venus is barely visible to the naked eye, for most of history humans went about their lives oblivious to such events.
装备了一架可以同时观测超过10万颗恒星的望远镜，开普勒搜寻着由行星的凌日现象所产生的微弱光线。
The craft, which is armed with a telescope that can track more than 100,000 stars simultaneously, looks for slight diminutions of light caused by planetary transits.
装备了一架可以同时观测超过10万颗恒星的望远镜，开普勒搜寻着由行星的凌日现象所产生的微弱光线。
The craft, which is armed with a telescope that can track more than 100, 000 stars simultaneously, looks for slight diminutions of light caused by planetary transits.
相比以前所使用的一些根据恒星重力引起的震动来探测行星的方法，凌日探测法可以发现体积小很多的行星。
Transit detection can pick up much smaller planets than previous methods based on gravity-induced wobbles in the stellar parent.
凌日是指行星(本次是金星)运行至太阳和地球之间，因此可以观测到太阳圆盘上有一个小黑点。
A transit occurs when a planet passes directly between the sun and the Earth; therefore the planet, in this case Venus, becomes visible and hence obscures a small portion of the solar disk.
观察太阳系外行星凌日的技术同Palle和他同事的技术近似，那就是利用月亮作为镜子看地球相对于太阳的凌日。
Looking for transiting extrasolar planets is analogous to palle and colleagues' technique - using the Moon as a mirror to watch Earth transit the Sun.
不过，那次 金星 凌日在欧洲无法看见，虽然克卜勒已向全世界发出了消息，但目前未知有任何人观察到它。
The transit of Venus, on the other hand, was not visible in Europe, and although Kepler had spread the word around the world, no one is known to have observed it.
今天，在上海的居民们有机会观察到“金星凌日”这一罕见的天文奇观。上一次上海出现这一奇观还是在138年前。
Today, local residents will have a chance to observe the transit of Venus in Shanghai, a rare astronomical wonder that was last viewed from the city 138 years ago.
他的第一站是里约热内卢，随后“奋勇号”继续向西航行到达大溪地。他们在那里建立营地，并测量了金星凌日的数据。
His first stop was Rio DE Janeiro, then the Endeavor 14 proceeded west to Tahiti where camp was established and the transit of Venus was measured.
但是艾姆斯研究中心的理论家杰克·利索尔称，如果没有可以观察的凌日现象，要想确定这些行星的轨道情况和质量就会难得多。
But Ames theorist Jack Lissauer says that if no transits are observable, it will be much harder to pin down the orbits and masses of these planets.
然而，由于行星之间的相互引力，它们确实会轻微地受到彼此的干扰，把相互之间的距离稍微拉近一点，这样就会在凌日的确切时间上引起微小的变化。
Still, the planets do slightly disturb each other with their mutual gravity, pulling each other around a little bit and thus causing tiny variations in the exact timing of the transits.
然而，由于行星之间的相互引力，它们确实会轻微地受到彼此的干扰，把相互之间的距离稍微拉近一点，这样就会在凌日的确切时间上引起微小的变化。
Still, the planets do slightly disturb each other with their mutual gravity, pulling each other around a little bit and thus causing tiny variations in the exact timing of the transits.
应用推荐