Assertion: winter solstice | /r/CapableOf | mark the point
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Source sentences:
text: Each hemisphere's cooler half of the year happens when it's tilted away from the sun, and its winter solstice (December in the north, June in the south) marks the point when that half of the globe is tilted away from the sun at its most extreme angle.
text: Marking the point when the sun is at its lowest point in the sky, the winter solstice ushers in the official start of winter in the northern hemisphere.
text: Marking the point when the sun is at its lowest point in the sky, the winter solstice ushers in the official start of winter in the northern hemisphere.