KEY CONCEPT Earth rotates on a tilted axis and orbits the Sun.

summer solstice and the Northern Hemisphere’s winter solstice. March EquinoxAfter another quarter of its orbit, Earth reaches another equinox. Half of each hemisphere is lit, and the sunlight is centered on the equator. You can see that the poles are again at the border between day and night. June Solstice This position is opposite the ... ................
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