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Author Question: Earth hits its perihelion position in January. Solar radiation is proportional to the distance ... (Read 137 times)

tichca

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on: Feb 28, 2020

Question 1

What is the right ascension and declination for Polaris, the North Star?
◦ RA indeterminate, D 90 degrees
◦ RA 0 hr, D 80 degrees
◦ RA 0 hr, D 0 degrees
◦ RA 90 hr, D -90 degrees

Question 2

Earth hits its perihelion position in January. Solar radiation is proportional to the distance squared between the Sun and the earth, so why isn't it hot in "winter" at perihelion?
◦ The ellipticity of the orbit is small, so the affect is small; seasons are caused by tilt of Earth's orbit.
◦ It is; it is called summer in the Southern Hemisphere, and there is just a time lag for the Northern Hemisphere.
◦ Precession modifies the effect as Earth wobbles on its axis.
◦ None of these is correct.
Earth Science ¦ Tarbuck, Lutgens, Tasa ¦ 15th Edition
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Marked as best answer by tichca on Feb 28, 2020

josephsuarez

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Reply #1 on: Feb 28, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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tichca

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Reply 2 on: Feb 28, 2020
YES! Correct, THANKS for helping me on my review

irishcancer18

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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