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  • Our moon is on the move.


  • Each year it drifts an estimated 1.5 inches further away from Earth.

    月球每年飄離地球約 1.5 英吋

  • And in the process, Earth's rotation is actually slowing down.


  • What if one night the moon simply disappeared?


  • Would we miss it?


  • A full moon is on average 14,000 times brighter than the next brightest night sky object, Venus.


  • Without it, every night would be as dark as a new moon and stargazing would be spectacular.


  • But by the next morning, you'd begin to realize just how important the moon is for life on Earth.


  • To start, between the sun, Earth's rotation, and the moon, the moon has the largest influence on Earth's tides.


  • Without it, high and low tides would shrink by an estimated 75%.


  • This would jeopardize the lives of many types of crabs, mussels, and sea snails that live in tidal zones


  • and disrupt the diets of larger animals who rely on them for food, threatening entire coastal ecosystems in the process.


  • Within a few decades, we would start to see mass population declines in the sea and on land.


  • One of the largest spawning events in the world occurs in the Great Barrier Reef.


  • Each November in the days following the light of a full moon,

    每年 11 月,滿月過後的幾天

  • coral colonies across the Reef, spanning an area larger than the state of New Mexico,


  • release millions of egg and sperm sacks within nearly minutes of one another.


  • Scientists are certain that the full moon plays a role in the timing, but exactly how remains a mystery.


  • On land, animals like these red crabs also use lunar cues to reproduce.


  • After living most of their lives on the mountains, millions of adult crabs migrate down to shore


  • and then only during the last quarter of the moon, females release their eggs into the sea.


  • Now, the moon may not hold as much sway over human reproduction,


  • but without it, something we care equally about would change, the weather.


  • Tides and tidal currents help mix cold, Arctic waters with warmer waters in the tropics.


  • This balances temperatures and stabilizes the climate worldwide.


  • Without the moon, weather forecasts would be practically impossible.


  • The average difference between the hottest and coldest places on Earth could grow to life-threatening extremes,


  • but none of this compares to the biggest change that we would have coming over the next millennium.


  • Right now, Earth tilts on an axis at 23.5 degrees, mostly due to moon's gravity.

    因為月球的引力,地球由軸心傾斜 23.5 度

  • If the moon disappeared, Earth's axis would wobble between anywhere from 10 to 45 degrees.

    若月球消失,地球軸心可能在 10 度到 45 度之間晃動

  • Some experts estimate that Jupiter could help keep Earth's tilt from reeling completely out of control,


  • but even just an extra 10-degree tilt could wreak havoc on the climate and seasons.

    但傾斜僅多 10 度就能造成對氣候和季節造成重大災害

  • In the past, Earth's tilt has changed by about one to two degrees, which scientists think could have caused Ice Ages in the past.

    過去,地球的傾斜曾改變 1 至 2 度,而科學家認為這造成了冰河時期

  • It's hard to know what a 10 degree or 45 degree tilt would do, but probably nothing good for most life on Earth.

    很難想像如果地球傾斜 10 或 45 度會有什麼結果,但對大部分地球生物來說,絕不會是什麼好事

  • The moon isn't just imperative for life on Earth today,


  • experts believe that it might have also played a key role in the formation of life more than 3.5 billion years ago.

    專家相信月球在 35 億年前地球生物形成時,也扮演重要角色

  • Turns out, the moon isn't just a beacon of light in the night sky.


  • Its existence is crucial to the delicate balancing act that makes life here possible.


Our moon is on the move.


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B2 中高級 中文 美國腔 月亮 地球 月球 傾斜 滿月 生物

如果有一天月亮消失了? (What Would Happen If The Moon Disappeared)

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    Rong Chiang 發佈於 2018 年 04 月 22 日