Astronomy1 - 23.5 degrees This slant does not change...

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January 31 st , 2008 Astronomy 101 Professor Orosz Homework Question #1 Why are the seasons reversed in the southern hemisphere relative to the northern hemisphere? In our normal year we go through spring, summer, fall, and winter. But when we are staying warm by the fire during winter here in the United States, people in Australia are out tanning at the beach; our winter is their summer. North of the equator and South of the equator are completely opposite when it comes to seasons. The reason for this is really simple. The earth orbits the sun at a slant. We view the equator as the middle line of Earth; a 90-degree angle straight up from the equator is north and straight down is south. But the equator does not run parallel to the orbit around the sun, it slants at about
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Unformatted text preview: 23.5 degrees. This slant does not change directions. Whichever side of the sun the Earth is on, the slant stays with our north pole in line with the same point. So when the Earth is slanted toward the sun, the sun is able to warm the northern hemisphere, but because of the angle it is unable to reach the southern hemisphere. This is when the northern hemisphere has its summer and the southern hemisphere has its winter. Now when the Earth is on the other side of the sun and it slants away from it, this is when the sun is able to warm the southern hemisphere better than the northern hemisphere; the south has summer while the north has winter....
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