【每日阅读训练第四期——速度越障2系列】【2-15】科技-astronomy

wensd1111

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abjure

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越障。

提出问题： 为什么天文学家能从金星的观察得出什么东西。

让后提出希望用来估计太阳的绝对距离。 后来有人发现了大气在金星。

很多人做出估计但不准确。 即使用了相片也不准确，

后来发现大气里面不是氧气，而是carbon。

后来科学家发现了比较接近的太阳距离。

neverland1021

谢谢baby姐~
1'38 appreciate the solar system from the art perspective. MB 筛选 and collected photos taken by unmanned spacecraft from NASA, XXX. XXX, to let people know the depth and beaty beauty of these pictures
1'26 Most pictures in exibition  exhibition from a book, the oldest pictures was taken in 1960's, the blue sphere of Uranus, and Benson's favorite picture 欧罗巴星球，木星的大红斑。
1'57 Introduction of transit of venus - 金星穿过太阳和地球之间，这种天文景象下次发生的时候到2117年了。and explain why transit of venus is so rare. two conditions: 1)584 days, 2)more than 100 years.
2'09 这次金星凌日的美国时间，introduce how to observe transit of venus, 不能用眼睛直接看否则会伤害视网膜，一个教授介绍了金星凌日在历史上的重要性，可以通过金星凌日来计算地球和太阳之间的距离，通过absolute scale来计算太阳有多大，最后介绍了历史上科学家合作在不同的地点尽量准确记录金星穿过太阳的时间
1'53 Use the principle of parallel to caculate calculate the distance between sun and earth and the volume of the sun(as we know the distance between two exact points on Earth and how long the transit of venus took in different places respectively); Maybe the transit of venus is now not as important as in 18th centry century , but it is still valuable to study, No matter you obsearve observe he transit of venus from scientific perspective or just because of curiosity, you should seize the opportunity since the last time will be 100 years later.

15'32
介绍了为什么金星凌日很重要？
按时间顺序来说各个年代科学家对金星凌日的发现，
1663 RJC 是一个数学家，在1668年出版了自己的观察成果，但是用的仪器有问题，后来牛顿改进后变得流行
Halley在1677年出版了自己观察的结果？？
11767年，俄罗斯的一个科学家在观察金星凌日的时候发现金星不是一个black disk而有光晕，从而说明了金星上有大气
说了first contact, second contact, third contact 还有forth contact的定义
因为地球大气有折射，还有仪器比较简陋，因此测算出的地球到太阳的距离有100万英里的误差
地球到太阳的举例被定义为AU
后来用光谱分析出金星上的大气绝大多数是CO2，而不是之前说的O2，氮气，金星上温度的描述？？金星上还含有硫的酸
把金星无磁场和地球有磁场作比较，描述了地球磁场的变化，而且不用担心磁场变化这个问题
最后说到太阳风对地球大气中粒子的影响和对其他星球的影响。

Hendy

掌管 5        00:18:49.43        00:27:11.04
掌管 4        00:01:50.20        00:08:21.60
掌管 3        00:01:50.18        00:06:31.40
掌管 2        00:01:42.70        00:04:41.21
掌管 1        00:02:58.51        00:02:58.51

想吃芭斯罗缤

time 1  1 ’54''
time2   1’28''
time3   2'01''
time4   1'57''

heiiokiki1

time 1 1'32
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Annasurlaroute

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T5 0'44'' 254 words

OB 7'50'' 2185 words
Scientists have calculated the distance by the movement of the Venus and now it still has value to study the anologous between the Venus and the Earth to know better of our planet.
Venus are long deemed as the twin of the earth,however, besides the similarity of the size and the distance to the sun, our earth has strong gravity,atmosphere, uneven density and magnet field while the Venus doesn't have.
Finally, some people worry that one day our polar will reverse, however we should not be worried because that will need a long time. Instead, we should worry about the evaporating atmosphere which help us prevent the particles from the sun that would seriously interfere our life.

chasefuture2017

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for a long period, the studies of solar system were all about science. M suggested that they should also work for art. he collected photographes of planets in solar system on internet which were shot by unmanned spacecraft, and arranges an exhibition to show the beauty and depth of the planets.

some of the pictures were first published in 2003, but many of them, which span 50 years exploration, reflect new worl too. one of the oldest image is the moon and earth in the same frame. the one M cherish the most is the picture of europa, one of jupiter’s four moon.

venus passes through the space between sun and earth in pairs, and it is 8 years the pairs spaced apart, and each pair seperated by gaps more than 100 years. the reason is that the condition of  this special astronomy phenomenen is strict——the sun/ earth/ venus are on a straight line. however, these three celestrial bodies are not on the same plane.

venus moves against the backwark of sun, and peopel should use a fliter or other devices to oberserve this spectacle since look directly to the sun can damage the retina. this phenomenen can help scientists calculate the scale of solar system, so years ago when people only knew the relative length between planets, they took chances to collected data.


the actual scale of sun can be calculated by the parallox method. although we now know the scale, it can still provide scientical values. people should not miss it

雪啊碧

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Gap2017

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