As the Earth orbits the Sun, the tilt of Earth's axis stays lined up with the North Star. The North Pole is tilted towards the Sun and the Sun's rays strike the Northern Hemisphere more directly in summer. ... When it is winter in the Northern Hemisphere, it is summer in the Southern Hemisphere.
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Answer:
As the Earth orbits the Sun, the tilt of Earth's axis stays lined up with the North Star. The North Pole is tilted towards the Sun and the Sun's rays strike the Northern Hemisphere more directly in summer. ... When it is winter in the Northern Hemisphere, it is summer in the Southern Hemisphere.