Wednesday, December 30, 2015

Why Earth has 4 seasons?

Nearly everyone enjoys the change of seasons on Earth – from winter to spring, from summer to fall. But why do our seasons change?

Some assume our planet’s changing distance from the sun causes the change in the seasons. That’s logical, but not the case, for Earth. Instead, Earth has seasons because our planet’s axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane – the plane of Earth’s orbit around the sun.

The tilt in the axis of the Earth is called its obliquity by scientists.



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