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集思廣益:太陽可以從西方昇起!
2017/09/03 02:02
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Schematic illustration of Earth's magnetic field.

 

 

引用文:集思廣益:太陽可以從西方昇起!(改寫)  http://city.udn.com/3309/5701617?raid=5702370#rep5702370

出處:[浪漫的南美風情城市]九月份主題「來說成語」 http://city.udn.com/3309/5701617?tpno=0&cate_no=0

 

 

 

集思廣益:太陽可以從西方昇起!

 

作者:大異人

 

集思廣益:面對一個問題,每個人自己所能思考的範圍有限,如果集合一群人共同思維, Brain Storming 的結果可開展大家的知見,共享成果。

 

在[浪漫的南美風情城市]八月份主題「如果」中,市長龍公主舉例提出的「如果太陽從西方昇起?」在詩人心底可能浮起無盡的浪漫情懷;但在科學家眼裡則為一「大哉問」!

 

大異人的科學「常識」還算豐富,但出自主觀意識的「死腦筋」只冒出來一個意念:讓月球誕生的行星撞擊,都不能使地球的地軸反著轉,如果力量大到使地軸反著轉,地表的動、植、一切生物必遭大滅絕…… 那麼,大家就得去到天堂或極樂世界再見了!    

 

幸好科學訓練的直覺就是「此乃獨夫之見」,必須「集思」;反射動作則是為文「提出問題及己見,以拋磚引玉」。

 

果不其然,寶玉紛至!請看:

 

第一類:方向是人訂的

 

如果~~地球反著轉 http://blog.udn.com/jfeng13x/108381453

 

1. 深思者 2017/08/17 11:27

方向是人訂的,怎麼轉,只是雨下的地方不一樣    

 

回覆:

果然是深思者!把東和西的定義反調一下就成了!不過地球還是玩它自己的,哈哈哈。    

 

如果~~東方朔說:太陽從北方昇起!你相信嗎?  http://blog.udn.com/jfeng13x/108378349

 

1樓. 文武兩邊站, 可可疊羅漢 2017/08/16 09:02

所謂的東南西北的方位,既然是人訂的,如果有人以不同的名稱定義這些方位,那麼太陽從「北方」升起也不能說不對。反正再怎麼便,太陽還是會從原本的方位升起降落。   

好比這「指鹿為馬」,如果不看歷史故事,若某人從小就被教導這種動物的名稱是馬,那麼他長大後便也認定該動物是馬,不會是鹿。   

 

回覆:

正如君言!閣主即為自幼被「日出東方」洗腦者,中年方「後知後覺」地「悟道」,哈哈哈…………

本文旨在提供週三娛樂,不在「懸疑」,故不再賣關子,請看:太陽從北方昇起  http://blog.udn.com/jfeng13x/81415509

 

一把尺  http://blog.udn.com/jfeng13x/81291892

 

2. 瞎摸 (?) 著象 2017/08/18 10:57

哦 ? !

世上 常有 完全相反的理論﹐ 都對。  例如﹐乘噴射客機﹐妳說往東﹐他說往西﹐豈不是180° 完全相反, 可 都能到達 美國 (殊途同歸﹐〝條條大路通羅馬〞)。 哈﹐地球是圓的 ?   http://classic-blog.udn.com/mbr8879576/267010

 宇宙 或 也是圓的 ? (艾因斯坦: 光綫会因重力弯曲)    

 

第二類:地球磁極反轉

 

Lansing 2017/08/18:「如果….--拉拉手吧? http://blog.udn.com/genglansing/105162362

87F回覆之回覆:

Sunrise in the WEST Scientists warn North could be South as Earth’s magnetic poles switch. (註:本引用文網址因鎖右鍵,不能複製,請自行往閱上附網址。)

 

附錄另一網址供參考:

NASA 2012: Magnetic Pole Reversal Happens All The (Geologic) Time https://www.nasa.gov/topics/earth/features/2012-poleReversal.html

Credits: Peter Reid, The University of Edinburgh

 

Scientists understand that Earth's magnetic field has flipped its polarity many times over the millennia. In other words, if you were alive about 800,000 years ago, and facing what we call north with a magnetic compass in your hand, the needle would point to 'south.' This is because a magnetic compass is calibrated based on Earth's poles. The N-S markings of a compass would be 180 degrees wrong if the polarity of today's magnetic field were reversed. Many doomsday theorists have tried to take this natural geological occurrence and suggest it could lead to Earth's destruction. But would there be any dramatic effects? The answer, from the geologic and fossil records we have from hundreds of past magnetic polarity reversals, seems to be 'no.'  

 

Reversals are the rule, not the exception. Earth has settled in the last 20 million years into a pattern of a pole reversal about every 200,000 to 300,000 years, although it has been more than twice that long since the last reversal. A reversal happens over hundreds or thousands of years, and it is not exactly a clean back flip. Magnetic fields morph and push and pull at one another, with multiple poles emerging at odd latitudes throughout the process. Scientists estimate reversals have happened at least hundreds of times over the past three billion years. And while reversals have happened more frequently in "recent" years, when dinosaurs walked Earth a reversal was more likely to happen only about every one million years.

 

簡言之,地球磁極南北反轉是「常態」,故太陽從西方昇起也是「常態」。值得欣慰的是,從地質及化石的證據顯示,經過幾百次的磁極反轉,地球不滅,生物物種不滅~~參見前段紅字部分。

 

第三類:地球被撞而反著轉

 

參考文: Why does the Sun rise in the East and set in the West?

https://www.quora.com/Why-does-the-Sun-rise-in-the-East-and-set-in-the-West

Can it rise in the West though? Does it happen on any planets?

 

Yes it does! Venus(金星)and Uranus(天王星)spin from East to West, so the Sun rises in the West. They are the only two planets the spin the opposite way. They’re cool like that.

 

Oh! But why are they special?

 

We still haven’t figured that out yet. But there are some theories. Venus(金星) is thought to have been spinning like the rest of them in the beginning, but may have slowly switched direction due to the massive storms on it surface. Venus doesn’t even rotate that fast anyways. In fact, one Venus day (254 Earth days) is longer than one Venus year (224 Earth days).

 

When it comes to Uranus(天王星), it’s spin is almost perpendicular to the way the rest of the planets spin. We suspect that something big has hit Uranus really hard on it’s head and ever since, Uranus has been rolling along on it’s path around the Sun.

………………………………………

 

簡言之,天王星的腦袋被一個「大東西」撞得反著轉。如果地球也遭此一劫,造成「地軸」反著轉,太陽固然將從西方昇起,但物種大滅絕也是必然結局。

 

第二類和第三類的不同之處:

 

第二類的「磁極反轉」只是地球上的「局部」變化,並不影響地軸旋轉,而產生如第三類的巨變。

 

第四類:飛航速度超過地球自轉速度

 

有位好友留言後,又自行刪除,不過他的觀點頗有見地,謹慨述如下:

如果在北緯 66 度以上,以超音速噴射機逆向飛行,當飛航速度超過地球自轉速度時,可見太陽從西方昇起。    

 .........................................................................................

 

北緯 66.5 度以上為北極圈,如果在日出時分,沿著它的外圍以「等音速」向西飛,大約半天多之後就可以看到太陽從西方昇起了。如果以「倍音速」向西飛,大約只需五小時即可。

 

當然,在「零緯度」的赤道上,地球以大約 1,667 km/h 的速度自轉,大於音速的 1,236 km/h,飛行器就得以超過 1,700 km/h或更高很多的速度朝西飛才行。

 

更有趣的是另一個極端,90 度的「北極點」。在那裡,羅盤上的磁針會直立起來,表示「東西南北的地圖方向」都不存在了。人站在「北極點」上隨便轉個圓圈,地球就得花 24 小時才追得上,而且你要太陽從那個方向出來,都是你說了算。但吊詭的「時間」仍然往前去,即使你逆向轉上一百圈,以為地球會「還給你」100天,也是痴心妄想 ~~ 所以 Superman以極速逆向飛行,回到 Lois Lang 被壓死之前的一分鐘去救她的電影情節,看一看,「感動」一下就好了,千萬別當真

 

Whoo!

「集思廣益」,「死腦筋」終於變活了些,哈哈哈…………

感謝好友們的回饋!

 

特別介紹逍遙閣主之方外好友心如

心如隨筆網址:

給閨蜜的一封信  http://blog.udn.com/jfeng13x/87327079

1 浮生若茶  http://blog.udn.com/jfeng13x/86762673

2 看海的狗  http://blog.udn.com/jfeng13x/86880870

3 如花綻放的容顏  http://blog.udn.com/jfeng13x/86991897

4 法緣  http://blog.udn.com/jfeng13x/87235104

5 用齋與藥石  http://blog.udn.com/jfeng13x/88442363

6 蚊子應誰的呼喚而至  http://blog.udn.com/jfeng13x/91083735

7 西藏綠教歌手  http://blog.udn.com/jfeng13x/91084816

8 夏日裡過海洋:水舞31  http://blog.udn.com/jfeng13x/99141736

9 夏日裡過海洋:水舞32  http://blog.udn.com/jfeng13x/99311016

10 夏日裡過海洋:水舞3http://blog.udn.com/jfeng13x/99386761

11主人與老鼠  http://blog.udn.com/jfeng13x/99628471

12 剃刀如人才  http://blog.udn.com/jfeng13x/100584313

13人生五隨(http://blog.udn.com/jfeng13x/100675502

14將軍與瓷杯(放下執著)http://blog.udn.com/jfeng13x/100816291

15人生五放(禪) http://blog.udn.com/jfeng13x/100909461

16虎與刺蝟  http://blog.udn.com/jfeng13x/101303991

17生命裡的碗  http://blog.udn.com/jfeng13x/101273236

18淋雨的老和尚  http://blog.udn.com/jfeng13x/102354033

 

 

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迴響(7) :
7樓. 深思者
2017/09/14 08:49
如果把地球自轉的方向改變想像成自轉軸方向地轉動。慢慢的轉動轉軸,當轉軸轉了180度,太陽是不是該由西方升起
哈哈哈,正是如此!....不過要得到據大位的天文學家們認可。 陸游2017/09/14 15:18回覆
6樓. 深思者
2017/09/13 13:32
有意思的是地球的地磁已反轉數萬次,而地球自轉的方向始終沒變過。
地球自轉的方向如果改變,帶來的會是生物大滅絕,所以這個「選項」還是別出現比較好,不過和現在的我們應該沒關係,哈哈哈 陸游2017/09/13 15:12回覆
5樓. BJ周
2017/09/05 13:41

我相信地磁改變過

才會造成地球前四次文明毀滅

地球進入冰河、洪水期

南北極從前是有綠地的

是的!地質、考古的證據已相當多了。不過冰河期的週期短得很多(每三萬年左右)。 陸游2017/09/05 14:26回覆
4樓. 華碩
2017/09/05 00:16
忘了說,天文上旋轉的東西如何定方向?  定規是逆時針轉叫向東轉
的確如此!天文學只談 spin, 不談這種地球上的東西南北方向。 本文附件中有說明:

Why does the Sun rise in the East and set in the West?

https://www.quora.com/Why-does-the-Sun-rise-in-the-East-and-set-in-the-West

 

陸游2017/09/05 00:54回覆

省大家一點時間,摘錄一段相關的如下:

除了 Venus and Uranus spin from East to West之外:

But why do all the other planets spin in the same direction? (from West to East)

 

Essentially, they spin in the same direction as that of the Sun. That’s because they all have originated from the sun. The story goes like this:

 

Billions of years ago, there was a cloud of dust so great that it collapsed under its own gravity. The concentration of the collapsing mass was so huge that it led to nuclear fusion and eventually formed the Sun. While most of the mass went to the Sun, the rest of it at the periphery flattened into a ‘proto-planetary’ disk. The planets, moons, asteroids and all the other bodies in our solar system were born from that.

 

Fascinating! But why has the mass at the periphery formed a disk? Why can’t it orbit around the sun in 3 dimensions .. sorta like in the picture below?

 

If the planets weren’t on a disk to begin with, their axes of rotation won’t have lined up with that of the Sun, and we won’t have the Sun rise in the same boring direction every single day!

 

Indeed, that’s an interesting observation. If you look at pictures of our universe, you would see disks everywhere. The solar system is a disk, Saturn’s rings are a disk, even the galaxies themselves are disks.

 

So, to summarize, the Sun rises in the East and sets in the West because the angular momentum of the universe hasn’t changed since the Big Bang, which means that structures which form from the same cloud of dust (like the Sun and it’s planets) tend to have the same spin, because of which the Earth revolves around the Sun while also spinning about the same axis, which in turn implies that the Sun has to ‘rise’ and ‘set’ in the directions we call ‘East’ and ‘West’ respectively.

陸游2017/09/05 00:56回覆
3樓. 華碩
2017/09/04 23:09

在天文上,不是太陽東昇西落,是地球自轉及繞著太陽公轉

在太陽系,太陽為恆星,視為不轉

在銀河系,太陽屬於某旋臂(一時想不起名稱),繞著銀河系的中心轉

銀河系繞著星系群轉

所以...只有相對方向,沒有絕對的方向

游老可以閱讀宇宙論 及 宇宙的最初3分鐘 及 宇宙的最後3分鐘等書

完全同意!哈哈哈........多謝! 陸游2017/09/05 00:36回覆
2樓. 戈 筆 揚
2017/09/04 14:17
I think you are not only a good teacher, even a better researcher.
I'm a slow learner, HaHaHa 陸游2017/09/04 14:53回覆
1樓. 吹起了自然風
2017/09/04 13:28

有點暈頭轉向了

無言(不予置評)

哈哈哈,鬼節到了啦!只能以不變應萬變,以不轉應萬轉.......得意 陸游2017/09/04 14:53回覆