1’59 The space is not only science but also art. 1’37 The collection photos spans a period of half century, with some recolored from blackwhite ones. All of them are fantastic. 2’07 The Chance to see Venus pass in front of Sun is so rare because the orbits of Earth and Venus are not in the same plane, so next time will happen in 2117. 2’21 The history of observation of Venus transit and its attributes to astronomy development 1’44 The summit of the observation rush occurred in 1800, but it still can provide some valuable data.
17’30 The observation of Venus transit in the past 400 years is a history of measuring the distance between Earth and Sun. The Venus’s atmosphere had been the obstacle of calculation the distance accurately for several centuries.
didnt measure the other 3. but seems the speed keeps stable, which is 150w/m
14'20"
The article tells a story about how people use Venus transit to measure the length between Earth and Sun. Specially it mentions a great Scientist's contribution. And how his work had been ignored, or been less respected in a certain time of history. (So it is always not the honor the money thing inspire you in doing something really great. Interest itself, or pure love, is the real thing behind all the great thing one can make. )
After that the story moves on tells the adventure in astronomy history that people across centuries took to get the accurate length.
A Russian scientist, L xxx, discovered the atmosphere of Venus. Then the author spend sometime talking about the component of it.
At last, back to the pure curiosity human have in know more about the universe. in a word, don't miss the last opportunity in your life to see this Venus transit.
嘿嘿…… 好文章咩~~ 1:34 很少有人把天文科学作为艺术 最近有人就作为了艺术 拍了照片 大体的展现了宇宙的形式 而且弄了个系统 可以查出每个行星的图片 1:45 在画廊展示的图半新半旧 旧的展示旧的知识 新的展示新的知识 举例2个：1地月系统 2另一个美丽的星球 最后说明了画廊的展出时间 1:38 姐姐的资料真应景 哈哈。。下次观察就是2117年咯。。 The most recent one was in 2004, and the second half of the pair is next week, during sunset on June 5th for North American observers, and during sunrise on June 6th for many in Europe and Asia. 这里没看懂 就查了查百科 金星凌日：两次为一组 组内每一次相差八年 每一组相差100年。。。（所以运气极好之人一辈子能看见4次 运气不好的一次也看不到。）。此天文现象发生时 太阳 地球 金星处于同一条水平线 从地球角度观察 就看见一个黑点从太阳上穿过去。。。 为什么这么罕见呢 因为金星与地球轨道角度不同 以地球为基准的话金星一般在地球的上端飘着 所以很罕见 1:28 金星凌日是测算地日距离的最佳日期。 当有了一个绝对比较的时候（因为金星就是个小黑点）你才能认识到太阳到底有多大 观测时要注意使用专业工具 不然直视太阳损伤视网膜 1:17 测算距离好啦 就算不新鲜了也是非常重要的天文现象啦 大家走过路过千万不要错过啦。。
1:09 56 1:06 1:11 1:12 ~ 17.08 1. why many scientists interesting?<--size of the solar system 2. solar system models measure the distance from sun to earth 3. the mearsurement of R was more accurate Newton’s method was more popular?G became unfairly unimportant 4. L’s observation of the first transit of Venus. *he observed halo, which indicated that atmosphere exists 5.The distance of earth-sun was uncertain because of “errors” 6. 1 second error would lead to thousands of miles of error of earth-sun distance 7. method: measure “4 contact times” 8.method:use photographic plates to capture the transit.(many of the photos were useless) 9.In 1960’s, the accuracy of e-s distance increased 10.The atmosphere of the Venus is not consist of water but CO2 and H2SO4 *the temperature of the surface is 800F!! 11.Venus is once considered as twin to Earth, but everything is different except diamieter and mass 12.the development of scientific discovery 13.Why V and E are different? 14.E has magnetic field, while V doesn’t *The magnetic field of E will change 15.the atmosphere forms around V because of Gravity *The atmosphere of Mercury, Venus, Earth, Mars changed by sun, but in different ways
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发表于 2012-6-6 00:22:00
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