Why do modern astronomers use celestial sphere?
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Likewise, what is the celestial sphere and why is it still useful today?
It is still used today to map out the constellations and measure distances and sizes between two objects that appear fixed because they are so far away from us. What is the celestial equator, and how is it related to Earth's equator? How are the north and south celestial poles related to Earth's axis of rotation?
Similarly, how do modern astronomers use constellations? They use them to roughly identify the area of the night sky they are observing. They are named in order of brightness by letters of the Greek alphabet with the name of the parent constellation. Briefly describe the equatorial system.
Also to know is, what is the purpose of the celestial sphere?
The celestial sphere is a practical tool for spherical astronomy, allowing observers to plot positions of objects in the sky when their distances are unknown or unimportant.
Who proposed the celestial sphere?