後太陽時代

over 4 years ago (Edited)

內容蠻天文科學的，我摘錄一些如下：

科學家最近所發現的一個天文現象，為他們提供了幾十億年後當我們的太陽「壽終正寢」後未來的一瞥。

天文學家觀察到一顆巨大的行星圍繞一顆白矮星（white dwarf）在運行。白矮星通常是恆星在耗盡了核燃料，它的核心就會坍縮成為致密的白矮星。白矮星是低質量恆星演化路線的終點。恆星在經歷紅巨星階段的末期，它的中心會因溫度、壓力不足以使碳氧元素進行核聚變，從而產生一個致密天體。大部分恆星的演化過程都包含白矮星階段。天文學家說，這也是他們所觀察到的行星可以在它們所圍繞旋轉的恆星「死亡」，變成白矮星後依然倖存下來的直接證據。

科學家根據計算認為，最多再有大約60億年，太陽就會膨脹為現有體積的200倍，成為一顆紅巨星（Red Giant）。隨著太陽的膨脹，它會吞併和摧毀我們的地球，之後，太陽就會變成一個白矮星。

當太陽達到紅巨星階段，它會不斷膨脹。屆時，我們的地球將會被吞沒。水星（Mercury）和金星（Venus）也不能倖免。但是火星（Mars）、小行星帶、木星(Jupiter)和太陽系中的其他行星將在其軌道基礎上向外擴張。

簡單地說就是，天文科學家透過觀察其它星系情況，預言了未來幾十億年後，咱們的太陽要是"死了"之後的太陽系情況，很不幸的是，地球將會被毀滅....

_{source: pixabay}

很傷心嗎？

其實，幾十億年，真的是長到難以想像的以後。如果那時候地球還存在，是的，地球存在並不是那麼必然，不是常常有聽過看過宇宙中的"漂泊"星體要撞過來嗎？只要稍微大一點的，地球就葛屁了.... 人類到時候還存在更是要非常非常幸運才行，有些小星體可能毀滅不了地球，但是毀掉生物可是綽綽有餘，一顆城市大小的隕石直接撞擊，我看就差不多了...

就算沒有或是人類很厲害可以摧毀來犯者，但還有太多可以毀掉人類的事情哪！太陽一個什麼黑子風暴，或是地球內部地殼怎麼了，太冷了，太熱了，(大氣)太薄了，人類這麼弱，動不動就得滅絕的...

喔，別說那些大的，小到不行的病毒、生態失衡、大氣變毒什麼的，全部都可以輕易殺死大半人類的...

更別說人類自己殺自己，歷史上殷殷為鑑，例子可多了...

咦？還沒說到可能突然出現的外星人來屠行星呢..... >_<....

唉，說真的，人類才活了有文明的幾千年而已，不就感覺很久很久了？這種"億"等級的時間觀，我感覺是神人等級的，咱們凡人就別跟著瞎操心了吧~~~~

況且，這篇文章最後給了一段挺能安慰廣大讀者的一段結論，你也一起安心一下吧！

不過，希望到那時，地球上的人類早已具備移民到太陽系以外的能力，或是飄蕩在太空中的人造城市中去了。

^_^

_{source: pixabay}

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4 comments

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over 4 years ago

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over 4 years ago

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over 4 years ago

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over 4 years ago

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