Saturday
August 23, 2014

Homework Help: Science

Posted by Lacy on Sunday, December 31, 2006 at 5:16pm.

The sun, moon and planets all follow approximately the same path from east to west across the sky; none of them is ever seen in the far northern or far southern sky. What does this suggest about the arrangements of these members of the solar system in space?

Think of terms of the plane in which each planet and moon moves, in relation to the Earth's orbital plane. That should give you a clue. Another important factor is that the earth's axis is only tilted 23 degrees away from a perpendicular to its orbital plane.

Planets and the moon certainly DO appear in the southern sky once a day from the northern hemisphere. What the question really means to say is that they do not appear anywhere close to the north or south celestial poles, which are the directions to which the polar axis points.

Look at a diagram of the solar system as you ask your question out loud. Think about what the sky would look like if you were standing on the equator, and then each of the poles.

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