Please, help me to answer these questions I don\'t need a sketch, I will draw it
ID: 293360 • Letter: P
Question
Please, help me to answer these questions
I don't need a sketch, I will draw it.
• Why does the Sun change its declination? Think in terms of the orientation of the Earth's axis of rotation and the orbital plane of the Earth. (Explain this in detail. Sketches will help.)
• Calculate the altitude of the Sun on the first day of Summer in Harrisburg? What will it be on the first day of Winter? Do the same for the North pole. Why are they different?
• Explain how the altitude of the sun affects the seasons. There are two things that happen with the changing altitude that I am looking for in this question.
• The Sun will be highest in the sky on June 21 and lowest on December 21. Why then are these not typically the hottest and coldest days of the year? What else is going on here?
Explanation / Answer
Reasson for the change in Sun's declination:
During the year the earth moves around the sun. As a result, the sun appears to move around the sky once with respect to the stars as seen from Earth.
Earth takes about 365 and a quarter days to travel once around the sun. Since the earth moves around the sun and we are resident on the earth, it means that the sun appears to shift in the sky about 1 degree per day. This number is calculated by taking the total degrees in a circle (360 deg, since the earth moves 360 degrees around the sun) and dividing that amount by the total number of days in a year (365.2422). The result is 360 deg / 365.2422 days to equal about 1 degree per day.
The plane of the earth's orbit is called the ecliptic. Since the earth orbits the sun, the sun is also on the ecliptic. As a result, the sun appears to us to move around the sky on the ecliptic.
The earth's axis also the celestial equator is actually tilted by 23.5 degrees with respect to the plane of the earth's orbit, or the ecliptic.This orientation means that the sun appears to transit the sky north of the eelestial equator during part of the year and south of the eelestial equator the other part of the year.
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