شارك
1 إجابة
يجب عليك تسجيل الدخول لإضافة إجابة.
هل نسيت كلمة المرور؟ الرجاء إدخال بريدك الإلكتروني، وسوف تصلك رسالة عليه حتى تستطيع عمل كلمة مرور جديدة.
برجاء توضيح أسباب شعورك أنك بحاجة للإبلاغ عن السؤال.
برجاء توضيح أسباب شعورك أنك بحاجة للإبلاغ عن الإجابة.
برجاء توضيح أسباب شعورك أنك بحاجة للإبلاغ عن المستخدم.
يجب عليك تسجيل الدخول لإضافة إجابة.
العربية 
English
It's a common misconception that Earth's distance from the sun causes the seasons. While it's true that Earth's orbit is slightly elliptical, meaning it's closer to the sun at some times (perihelion, in January) and farther at others (aphelion, in July), this difference in distance has a very minorاقرأ المزيد
It’s a common misconception that Earth’s distance from the sun causes the seasons. While it’s true that Earth’s orbit is slightly elliptical, meaning it’s closer to the sun at some times (perihelion, in January) and farther at others (aphelion, in July), this difference in distance has a very minor effect on temperature.
قراءة أقلThe primary reason July is the hottest month in the Northern Hemisphere, even though Earth is farthest from the sun, is Earth’s axial tilt.
Here’s why:
* Axial Tilt: The Earth is tilted on its axis by approximately 23.5 degrees relative to its orbital plane around the sun.
* Direct Sunlight: In July, the Northern Hemisphere is tilted towards the sun. This means:
* More direct sunlight: The sun’s rays hit the Northern Hemisphere at a more direct, perpendicular angle. This concentrates the solar energy over a smaller area, leading to more intense heating.
* Longer daylight hours: The Northern Hemisphere experiences longer periods of daylight, giving it more time to absorb solar radiation.
* Indirect Sunlight (Southern Hemisphere): Conversely, in July, the Southern Hemisphere is tilted away from the sun. This results in indirect sunlight (rays hitting at a more slanted angle) and shorter daylight hours, leading to winter in the Southern Hemisphere.
Think of it like this: Imagine shining a flashlight directly onto a surface versus shining it at an angle. When the light hits directly, it’s more concentrated and intense. When it hits at an angle, the light is spread out over a larger area, making it less intense. The same principle applies to sunlight and Earth’s tilt.
While the distance difference (being at aphelion in July) does mean Earth receives slightly less total solar energy, this effect is minuscule compared to the impact of the axial tilt on how directly and for how long sunlight hits a particular hemisphere.