Question

Define the following terms
a. Equinox
b. Aphelion
c. Circle of Illumination

2. What are the phenomenon responsible for the change for seasons?

3. Imagine what would happen if the earth’s axis was really perpendicular to the
plane of the earth’s orbit. Support your answer with suitable points.

Answer all for 30 POINTS!!!!!

Answer 1

Hi Friend! (Jaalina),

1. Definition:

a. Equinox- The time or date at which the sun crosses the celestial equator.

b. Aphelion- The point in the orbit of a planet, asteroid, or comet at which it is furtest from the sun.

c. Circle of Illumination- The circle that divides the day from night on the globe.

2. What are the phenomenon responsible for the change for seasons?

ans. The phenomenon of the change of seasons is called due to two reasons:

• {i} The revolution of the earth around the sun.

• {ii} The onclination of the earth's axis angle of 66 (1 by 2) to the plane of its orbit.

The phenomenon of changing seasons can be understood with the help of four positions of the earth during revolution arond the sun.

3. Imagine what would happen if the earth’s axis was really perpendicular to the  plane of the earth’s orbit. Support your answer with suitable points.  

ans. First of all, we would have no seasons. The hours of day and night would be the same everyday all over the world. The sun would rise due east and west everyday.

Thank you For asking!!

Hope it helped!

-Zeezee

Answer 2

a. Equinox- The time or date at which the sun crosses the celestial equator.

b. Aphelion- The point in the orbit of a planet, asteroid, or comet at which it is furtest from the sun.

c. Circle of Illumination- The circle that divides the day from night on the globe.

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