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There are 8 lessons in this physics tutorial covering Orientation in the Sky and Constellations. The tutorial starts with an introduction to Orientation in the Sky and Constellations and is then followed with a list of the separate lessons, the tutorial is designed to be read in order but you can skip to a specific lesson or return to recover a specific physics lesson as required to build your physics knowledge of Orientation in the Sky and Constellations. you can access all the lessons from this tutorial below.
In this Physics tutorial, you will learn:
Do you know how to find the north direction during the night? Can you find the other directions if you know the direction of north?
Do we always see the same celestial bodies at the same position in the sky?
Do we always see the same celestial bodies at the same position in the sky in different periods of year?
How do we take the position of Earth when observing the sky? Does it make any difference if you take another celestial body as a frame of reference? Why?
Like all the other phenomena, the study of the sky requires some reference points as orientation. Recall that all planets of the solar system including Earth revolve around the Sun in elliptic orbits. Stars and planets rotate around their own axis as well. An observer on Earth (if taking Earth as fixed reference system) considers the Sun, Moon and stars as revolving in periodic orbits around it, in very regular periods. This approach puts us in the the same position as our ancestors who believed that the Earth is stationary and all celestial bodies revolve around it. Although we now know that this is not true, this approach is very comfortable in our goal of gaining acquaintance with the sky and all "actors" participating in the nighlty show it offers to our sight.
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