On December 22, 2023, at 12:28 PM (Japan Standard Time), a significant moment occurred on Earth. In the Southern Hemisphere, the sun shone directly above the Tropic of Capricorn, while in the Northern Hemisphere, the winter solstice arrived. This phenomenon is due to the tilt of the Earth, causing variations in the sunlight received throughout the year and leading to changes in seasons.
The winter solstice marks the beginning of winter in the Northern Hemisphere, with the shortest daylight and longest night of the year. The Earth's tilt at 23.5 degrees causes a shift in the time and location where sunlight reaches. Following this day, daylight in the Northern Hemisphere gradually lengthens until reaching equal day and night durations around the spring equinox in March. The winter solstice and summer solstice are crucial moments in the apparent movement of the sun.
2023年12月22日の12時28分(日本時間)に、地球上で重要な瞬間がやってきた。南半球では太陽が南回帰線の真上で輝き、北半球では冬至が訪れている。これは地球が傾いているためで、太陽の光が一年の間に変動し、季節が変わる原因となる。
冬至は、北半球では冬の始まりで昼が最も短く夜が最も長い日。地球が23.5度傾いているため、太陽の光を受ける時間と場所が変化する。この日を境にして、北半球では昼が長くなり、3月の春分まで日が伸び続ける。冬至と夏至は太陽の動きにおいて重要な瞬間です。
| 英語 | 日本語 | 種類 | 具体例 |
|---|---|---|---|
| Significant | 重要な | 形容詞 | This discovery is a significant advancement for the scientific community.|その発見は科学界にとって重要な進展です。 |
| On Earth | 地球上で | 熟語 | This is a historical event that occurred on Earth.|これは地球上で起こった歴史的な出来事です。 |
| Southern Hemisphere | 南半球 | 名詞 | Australia is located in the Southern Hemisphere.|オーストラリアは南半球に位置しています。 |
| Northern Hemisphere | 北半球 | 名詞 | Winter is approaching in the Northern Hemisphere.|北半球では冬がやってきます。 |
| Winter solstice | 冬至 | 名詞 | On the winter solstice, the daylight becomes the shortest.|冬至には昼が最も短くなります。 |
| Summer solstice | 夏至 | 名詞 | On the summer solstice, the daylight becomes the longest.|夏至の日には昼が最も長くなります。 |
| Movement | 動き | 動詞 | The seasons change due to the movement of the Earth.|地球の動きによって季節が変わります。 |
| 問題 | a | b | c | d | 選択 | 答え |
|---|---|---|---|---|---|---|
| In which hemisphere did the sun shine directly above the Tropic of Capricorn? | Northern Hemisphere | Southern Hemisphere | Equator | Both Hemispheres | ||
| What is the reason for the variation in sunlight received throughout the year? | Earth's rotation speed | Earth's elliptical orbit | Earth's tilt | Earth's magnetic field | ||
| What does the winter solstice mark in the Northern Hemisphere? | The beginning of summer | The longest daylight of the year | The start of winter | Equal day and night durations | ||
| What is the Earth's tilt angle that causes the variation in sunlight? | 90 degrees | 23.5 degrees | 45 degrees | 180 degrees | ||
| What happens to daylight in the Northern Hemisphere after the winter solstice? | It remains constant | It gradually shortens | It gradually lengthens | It disappears completely |
| 問題 | 選択 | 答え |
|---|---|---|
| In which hemisphere did the sun shine directly above the Tropic of Capricorn? a) Northern Hemisphere b) Southern Hemisphere c) Equator d) Both Hemispheres |
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| What is the reason for the variation in sunlight received throughout the year? a) Earth's rotation speed b) Earth's elliptical orbit c) Earth's tilt d) Earth's magnetic field |
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| What does the winter solstice mark in the Northern Hemisphere? a) The beginning of summer b) The longest daylight of the year c) The start of winter d) Equal day and night durations |
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| What is the Earth's tilt angle that causes the variation in sunlight? a) 90 degrees b) 23.5 degrees c) 45 degrees d) 180 degrees |
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| What happens to daylight in the Northern Hemisphere after the winter solstice? a) It remains constant b) It gradually shortens c) It gradually lengthens d) It disappears completely |