８０億人が住んでる青い地球

【画像をクリックすると臨場感が出ます。】

　私たちは、うっかり宇宙は明るいと思いがちですが、このような地球の昼間の地域の写真を見ても「宇宙は暗黒」であることが分かります。太陽光が当たっている部分のみが明るく、これは私たちが「暗い空に浮かぶ満月」を見ているのと同じです。

　太陽～地球間の距離は約１億５千万㎞と言われ、地球が太陽からちょうど良い距離に浮いていることで気温が適温であり、地球人は生きていられます。地球の公転軌道はやや楕円と考えられ、これは金環食や皆既日食が起こることで分かります。また、地軸が約２３．４°傾いたまま公転を続けることで有難いことに四季が生じてます。

　平素、「私たちは宇宙に浮いてること」を意識せず暮らがちですが、時にはＩＳＳからの写真を見て、地球は雲と海に囲まれ、水があり、それにより地上では沢山の樹木が光合成し、結果的に食料ができ、酸素が生成されることで私たちは生きてます。

　この掛け替えのないこの地球に、現在、約８０億人が暮らしてます。しかし、人間とは愚かなのでしょうか。歴史を紐解いても、昔から現在に至るまで、あちこちで戦火が絶えません。日本では今日は「戦争放棄を誓った憲法記念日」。今や、世界平和は優れた指導者の腕に掛かってます。

　先日、私は孫娘【小４】に誕生日プレゼントとして「地球儀と英語のかるた」を贈りました。海と陸地の割合、世界の国の位置や地軸の傾きを知ると共に、地球上で日本語を話す人は２％のみであること、故に英語を勉強すべきこと、宇宙空間に浮かび、自転と公転を続ける地球に住んでる意識を彼女が持てるようにと願ってます。もっとも嬉しいことは地球に住んでるからこそ音楽が楽しめることです。

Dear my friends abroad

　The simultaneous interpretation for your understanding will be after my breakfast in Japan time.

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　We tend to think that space is bright, but when we look at photo of Earth's daytime regions, we can recognize that space is really dark. Only the parts of the earth that are exposed to sunlight are bright, similar to a full moon floating in a dark sky.

　As you know, the distance between the sun and the earth is said to be approximately 150 million km, and because the earth is floating at the suitable distance from the sun, the temperature is also suitable so that people on earth can survive. The Earth's orbit is thought to be elliptical, and this fact can be recognized by the occurrence of annular and total solar eclipses of the sun. Additionally, thanks to the fact that the Earth's axis continues to revolve with tilt at the angle of approximately 23.4 degrees, therefore we have four seasons.

　Normally, we tend to live without being conscious of the fact that we are floating in space, but sometimes when we look at photos from the ISS, we realize that the Earth is surrounded by clouds and oceans, and it rains, so there is a lot of water on the ground. Trees photosynthesize, resulting in the production of food and oxygen, which allows us to live.

　Approximately 8 billion people currently live on this irreplaceable earth. But are humans stupid? No matter how much history we look at, since the ancient times to the present, wars continue to rage here and there. In Japan, today is the anniversary of the Constitution day pledging to renounce war. Now, world peace rests upon the hands of excellent leaders.

　By the way, the other day, I gave my granddaughter [4th grade of elementary school] a celestial globe and English karuta which is Japanese cards as a birthday present. In addition to learning about the proportion of land and ocean, the location of countries in the world, and the tilt of the earth's axis, for her learning that only 2% of the people on earth speak Japanese, so it is indispensable for her to learn English. We are living on our planet floating in space that continues to rotate and revolve. I hope she can know it. The happiest thing is that we can enjoy music because we live on Earth.

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