European Space Agency releases beautiful photo of autumnal equinox: all about it here


The European Space Agency (ESA) recently shared an image of the autumnal equinox, the moment when day and night equally divide the Earth’s surface. This equinox event occurs twice a year and is important in astronomy. This occurs when the center of the Sun aligns perfectly with the Earth’s equator, causing day and night to be approximately the same length everywhere on Earth.

To understand this, let’s dig a little deeper. The Earth is tilted slightly, about 23.5 degrees. Because of this tilt, sunlight hits the Northern and Southern Hemispheres differently throughout the year. However, during the equinox, sunlight is equally distributed between the two hemispheres.

The exact dates of these equinoxes vary between hemispheres. For example, the spring equinox (also known as the vernal equinox) occurs around March 20 and 21 in the Northern Hemisphere, but around September 22 and 23 in the Southern Hemisphere.

In the Northern Hemisphere, the autumnal equinox occurs on September 22 or 23, depending on the alignment of the Sun and Earth. In the Southern Hemisphere, it occurs around March 20 and 21, marking the beginning of spring.

Near the equator, the central part of the Earth that divides our planet into two halves, day and night are approximately equal in length throughout the year.

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However, as you move towards higher latitudes such as the North Pole, you will notice more significant differences between the duration of day and night, especially during the summer and winter solstices. This happens because the sun’s rays struggle to reach these areas and the Earth’s rotation becomes the primary cause of the day and night changes.




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