tag:blogger.com,1999:blog-38403698.post1296575413162022685..comments2024-02-16T16:24:09.472+10:00Comments on 子貓物語~~附庸風雅: 談一談中國二十四節氣Chrishttp://www.blogger.com/profile/10133122741874926109noreply@blogger.comBlogger32125tag:blogger.com,1999:blog-38403698.post-43305953995505694432014-12-23T20:10:26.180+10:002014-12-23T20:10:26.180+10:00是的。謝!是的。謝!Chrishttps://www.blogger.com/profile/10133122741874926109noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-30194963630885164862014-12-23T20:02:01.037+10:002014-12-23T20:02:01.037+10:00"加十五日指醜,則大寒,音比無射。" 中的 "醜", 應是 ..."加十五日指醜,則大寒,音比無射。" 中的 "醜", 應是 "丑".Henry Hohttps://www.blogger.com/profile/01828596883201450863noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-6791790078427356712013-01-16T22:03:43.531+10:002013-01-16T22:03:43.531+10:00非常厲害!非常厲害!Chrishttps://www.blogger.com/profile/10133122741874926109noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-21517865637738881972013-01-16T21:43:53.249+10:002013-01-16T21:43:53.249+10:00FYI, an example of Ming Dynasty math and music res...FYI, an example of Ming Dynasty math and music research, equal temperament musical scale and the 12th root of 2 to 24 decimal places:<br />http://zh.wikipedia.org/wiki/%E6%9C%B1%E8%BC%89%E5%A0%89 <br />http://zh.wikipedia.org/wiki/File:%E4%B9%90%E5%BE%8B%E5%85%A8%E4%B9%A6%E5%85%A8-123.jpg<br />--zpdrmnAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-38403698.post-49714481336549249962013-01-05T16:50:41.113+10:002013-01-05T16:50:41.113+10:00北極星比其他的星略大一點.
阿拉斯加又是在美國最北的一個洲.
又聽說那裏的人很擅長外交.
有趣.北極星比其他的星略大一點.<br />阿拉斯加又是在美國最北的一個洲.<br />又聽說那裏的人很擅長外交.<br />有趣.蝮https://www.blogger.com/profile/15838174598652684605noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-44111942399596233192013-01-05T15:05:11.647+10:002013-01-05T15:05:11.647+10:00I don't know much about philosophy. I just see...I don't know much about philosophy. I just see it as a working methodology learned from past mistakes by scientists as a whole. --zpdrmnAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-38403698.post-13943916635081933582013-01-05T14:54:34.862+10:002013-01-05T14:54:34.862+10:00蝮,
//把天璇, 天樞連成直線並延長五倍的距離, 就可以找到北極星// the same for ...蝮,<br />//把天璇, 天樞連成直線並延長五倍的距離, 就可以找到北極星// the same for Westerners: Polaris, the North Star, is found by imagining a line from Merak (β) to Dubhe (α) and then extending it for five times the distance between the two Pointers. (Wiki)<br />Interesting trivia: take a look at the design of Alaska State flag: http://en.wikipedia.org/wiki/Alaska<br />--zpdrmn<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-38403698.post-31114549389301623952013-01-05T07:43:56.373+10:002013-01-05T07:43:56.373+10:00以前讀過皮毛的Philosophy of Science,記得有類似的說法。以前讀過皮毛的Philosophy of Science,記得有類似的說法。Chrishttps://www.blogger.com/profile/10133122741874926109noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-76871079707517329742013-01-05T07:42:51.944+10:002013-01-05T07:42:51.944+10:00謝資料!謝資料!Chrishttps://www.blogger.com/profile/10133122741874926109noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-64050528214530997592013-01-04T23:08:43.718+10:002013-01-04T23:08:43.718+10:00我完全不懂, 但能做一下文抄公, 來自王力主編的中國古代文化常識, 第一章天文:
古人很重視北斗,...我完全不懂, 但能做一下文抄公, 來自王力主編的中國古代文化常識, 第一章天文:<br /><br />古人很重視北斗, 因為可以利用它來辨方向, 定季節. 把天璇, 天樞連成直線並延長五倍的距離, 就可以找到北極星, 而北極星是北方的標誌. 北斗星在不同的季節和夜晚不同的時間, 出現於天空不同的方位, 人們看起來它在圍繞着北極星轉動, 所以古人又根據初昏時斗抦所指的方向來決定季節: 斗柄指東, 天下皆春; 斗柄指南, 天下皆夏; 斗柄指西, 天下皆秋; 斗柄指北, 天下皆冬.<br /><br />這本書內容頗硬, 也因內容包括太多主題, 內容並不十分完全, 但卻蠻有一看價值, 尤其是有興趣諗古書的話.<br />姑且借此列一下十四章主題:<br />天文, 曆法, 樂律, 地理, 職官, 科舉, 姓名, 禮俗, 宗法, 宮室, 車馬, 飲食, 衣飾, 什物.<br /><br />P.S. 我不是在商務印書館工作蝮https://www.blogger.com/profile/15838174598652684605noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-49204647780897676612013-01-04T21:39:10.142+10:002013-01-04T21:39:10.142+10:00Science is empirical. Sometimes, even if the theor...Science is empirical. Sometimes, even if the theory sucks but the empirical data guide you in a big way. And you can still get a lot of things right.<br />On the other, even if the theory is very elegant and sophisticated but the empirical data don't support it, you need to rewrite or even throw away the theory. --zpdrmnAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-38403698.post-56558644298989677612013-01-04T21:32:53.151+10:002013-01-04T21:32:53.151+10:00I learn from you too. Your info is interesting and...I learn from you too. Your info is interesting and makes me dig deeper a little. I wonder if back then laymen used the Big Dipper to make estimates while the court scientists used a more accurate method. That could be the case. Again, I don't really know. <br />I always question stuffs, especially if they are about science. It's a die hard habit from my college days. --zpdrmnAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-38403698.post-29046426115279494022013-01-04T07:15:39.914+10:002013-01-04T07:15:39.914+10:00古人不知道萬有引力能吸著人不至掉出太空,不能想象「地球」,所以有「天圓地方」的想法。
看過有些文章說...古人不知道萬有引力能吸著人不至掉出太空,不能想象「地球」,所以有「天圓地方」的想法。<br />看過有些文章說,中世紀的教會也是以此為真理,美國現在有些教會,仍然信這套。Chrishttps://www.blogger.com/profile/10133122741874926109noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-29249455096623432142013-01-04T07:09:59.806+10:002013-01-04T07:09:59.806+10:00謝謝,獲益良多。謝謝,獲益良多。Chrishttps://www.blogger.com/profile/10133122741874926109noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-67597075654210375302013-01-04T03:40:24.593+10:002013-01-04T03:40:24.593+10:00以前看過介紹中國古代天文學的書籍,最驚奇的地方是:中國古代天文學的理論基礎是錯誤的,但錯誤的理論卻能...以前看過介紹中國古代天文學的書籍,最驚奇的地方是:中國古代天文學的理論基礎是錯誤的,但錯誤的理論卻能解釋和推演很多真實的天文現象。這就好似中醫的經絡理論,拿本質上不存在的東西作為立論依據來治病救人,功效神奇。這是很值得玩味的地方。<br /><br />古代中國人似乎從未意識到地球是個球體。即便渾天說認為天如雞子,地如卵黃,其本意也絕不是說地球像蛋黃一樣是個球體,只是形容天包裹着地而已。大可以把渾天說里的地,理解成一個扁平的盤子,只有朝上的一面才有山川草木人畜。日月星辰散布在天球上,圍著“地盤子”转,當日月星辰轉到“地盤子”下面时,就在天空中看不到了。Anonymoushttps://www.blogger.com/profile/04127776375536039133noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-42307069463386336572013-01-03T22:01:40.792+10:002013-01-03T22:01:40.792+10:00今年双春,年花會早開,明年冇立春,又俗稱盲年.今年双春,年花會早開,明年冇立春,又俗稱盲年.KFnoreply@blogger.comtag:blogger.com,1999:blog-38403698.post-12726948936949720372013-01-03T20:41:22.120+10:002013-01-03T20:41:22.120+10:00老兄研究比我深,要跟你學嘢。老兄研究比我深,要跟你學嘢。Chrishttps://www.blogger.com/profile/10133122741874926109noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-52653560519931289912013-01-03T19:54:15.175+10:002013-01-03T19:54:15.175+10:00Thank you for pointing it out. I have read similar...Thank you for pointing it out. I have read similar description before, but I don't have any sources off hand, so I haven't said anything. Once again, it shows how advanced ancient Chinese technology was. --zpdrmnAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-38403698.post-87547862024768551952013-01-03T19:43:42.512+10:002013-01-03T19:43:42.512+10:00It makes me dig deeper about Big Dipper.
The resu...It makes me dig deeper about Big Dipper. <br />The result leads to my guess: The Big Dipper may have been used in determining winter solstices, but it was probably not very accurate, given the technology back then. It was, if so used, probably replaced later by more accurate methods by observing the Sun. But I'm no astronomer or science historian. So, it's just a guess. <br />What lead to my guess are the info you've provided and the following.<br /><br />One can use the big dipper to determine the season, because its orientation is different in different seasons. (http://www.synapticsystems.com/sky/learnsky.html)<br />Whether the accuracy, using it to determine a certain day, is within a day or not is another question. <br />What time of the evening one observes it may affect the result in fixing a certain day, because its orientation keeps changing during the night. <br />"Go out tonight ( unless its cloudy ) and look for the Big Dipper. Make a mental note of where it is. Now go back out a few hours later and look for it again. You will see that it has moved." (http://www.synapticsystems.com/sky/learnsky.html)<br /><br />An extreme case:<br />"(An important note: This stellar method of tracking the seasons has been designed to apply to the sky in the evening when most people are observing. If you are looking after midnight or in the wee hours of the morning, the Big Dipper will be in a position that doesn’t relate to the current season with this method because the Earth continues to spin all night, changing the location of the stars around Polaris.)"<br />Source: http://connect.sierraclub.org/post/OnTrack/the_big_dipper_tells_the_seasons.html?cons_id=&ts=1357203955&signature=66b6b53013eff93572b2ec835a39343e<br /><br />To fix the day of winter solstice, one needs an accurate enough measurement. From Wiki: "...to be precise to a single day one must be able to observe a change in azimuth or elevation less than or equal to about 1/60 of the angular diameter of the sun. Observing that it occurred within a two day period is easier, requiring an observation precision of only about 1/16 of the angular diameter of the sun... This is often done by watching the sunrise and sunset or vice versa or using an astronomically aligned instrument that allows a ray of light to cast on a certain point around that time."<br />--zpdrmnAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-38403698.post-29151476376479048912013-01-03T18:27:00.574+10:002013-01-03T18:27:00.574+10:00廿四節氣是跟太陽年, 因為用月亮的話, 由於月亮年比大陽年少, 因此只用月亮年, 不能估計到耕作時間...廿四節氣是跟太陽年, 因為用月亮的話, 由於月亮年比大陽年少, 因此只用月亮年, 不能估計到耕作時間,<br />所以中國會用陰陽曆, 加入節氣和19年7潤。<br /><br />中國節氣計法, 用冬至, 夏至, 春分, 秋分, 定位後, 再平均分配。<br /><br />潤月的定法, 由於廿四節氣, 理論上一個月有2個節氣, 因此, 如該陰曆月無中氣, 就潤那個月,<br />那就可令到同一個月有2個節氣。<br /><br />而中國早於周朝已知一年有365又4份1日, 所以中國所用的天球度數, 一個圓是365又4份1度, 和西方360度不同, 看古代天文誌要知這一點。<br /><br />何解中國天球一個圓是365又4份1度? 是因為在太陽在天球黃道行, 一日行一度, 一個圓剛好一年。<br /><br />至於地球是否圓的問題, 中國古代司天監有討論過蓋天說和渾天說的問題, 但因傳統看法天圓地方所限, 所以只討論天是否球體, 因為司天監發現不同司天台測量數據有出入。<br />最後在唐朝時期做了個官方實驗(幾時就忘記了, 畢竟是十年前做的學校PROJECT), 分別在北方和南方在同一日(忘了冬至日還是夏至日)正午用圭表度影長, 最後是渾天說勝, 證明天球是球體。 <br />Wan Leung Wonghttps://www.blogger.com/profile/15237098215567203761noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-41805421164949164212013-01-03T18:05:39.667+10:002013-01-03T18:05:39.667+10:00我若干年前`查過,以為弄錯,1942出生,至今中西曆同日只一次,謝謝代查.我若干年前`查過,以為弄錯,1942出生,至今中西曆同日只一次,謝謝代查.KFnoreply@blogger.comtag:blogger.com,1999:blog-38403698.post-52889753070269343912013-01-03T17:53:48.262+10:002013-01-03T17:53:48.262+10:00要待高明指點了。
我想起老殘遊記第12回的一段
「北斗七星開陽搖光,像幾個淡白點子一樣,還看得清楚。...要待高明指點了。<br />我想起老殘遊記第12回的一段<br />「北斗七星開陽搖光,像幾個淡白點子一樣,還看得清楚。那北斗正斜倚在紫微垣的西邊上面,杓在上,魁在下。心裡想道:「歲月如流,眼見斗杓又 將東指了,人又要添一歲了....」<br />是古人用北斗星移動以計算一年之中的日子的方法。Chrishttps://www.blogger.com/profile/10133122741874926109noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-90099234421164342392013-01-03T17:38:38.638+10:002013-01-03T17:38:38.638+10:00幫你查過,
1923, 1942, 1961年的10月30日都是農曆九月廿一。
1980, 1999...幫你查過,<br />1923, 1942, 1961年的10月30日都是農曆九月廿一。<br />1980, 1999, 2018年的10月30日都是農曆九月廿二。Chrishttps://www.blogger.com/profile/10133122741874926109noreply@blogger.comtag:blogger.com,1999:blog-38403698.post-65074841995588440912013-01-03T17:38:03.380+10:002013-01-03T17:38:03.380+10:00Try to make myself clearer: The position relative ...Try to make myself clearer: The position relative to the Sun the Earth is at in its orbit determines when summer solstice, winter solstice, spring equinox, or autumn equinox is. To fix these days, observing the movement of the Sun in the sky and the shadows it casts is more direct than observing 北斗星. Even if one could do it with 北斗星, it would be much more difficult. Why bother? I am not even sure if one can really do it with 北斗星 (using star positions??). That's why I doubt it. --zpdrmn<br /> Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-38403698.post-25764245541968819242013-01-03T17:29:55.005+10:002013-01-03T17:29:55.005+10:00Eratosthenes,謝謝提供名字。
我是憑幾十年前看的科普書的記憶道出的。Eratosthenes,謝謝提供名字。<br />我是憑幾十年前看的科普書的記憶道出的。Chrishttps://www.blogger.com/profile/10133122741874926109noreply@blogger.com