(I guess you could call this linear momentum.) The momentum of an object will only change when there is an external force on the object. If you take an object and push it, it will have momentum. Let me pretend that it doesn't change it all. The orientation of Earth's rotation axis does change a bit-just not very fast. Why Does the Earth's Axis Point the Same Way? Like I said, making these things is a tough task. I am pretty sure this isn't a real analema, but just a graphic. This is basically a map of the location of the sun at its highest point for every day during a year. The effect is difficult to notice from day to day, but if you were very very very patient, you could make an analema. Since the motion of the Earth around the sun isn't a completely circular orbit, the Earth moves faster at sometimes than others. The motion of the sun in the sky isn't as simple as most people guess. If you drew a circular path very near either the north or south pole, you could be at a case where you are only in the light or only in the dark. So for the same time in the southern hemisphere, the days are shorter than the night. What about a location in the southern hemisphere during this same time? If you drew the same kind of circular path you would see that it spends more time in the dark than in the light. This shows a location in the northern hemisphere during the summer. However, the path this red dot would take would be more in the light side than in the dark side since this circular path is not perpendicular to the day-night line. Half the Earth is in the sunlight and half is in the dark. Look at the red dot on the Earth and the path it travels as the Earth rotates.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |