Moderate as in sky A concept used in astronomy, referring to an imaginary, vast, and perfectly round shell that surrounds the Earth. It serves as a simplified representation of the sky, helping astronomers locate and describe celestial objects. Clear All
2 Example Sentences Showcasing the Meaning of 'Celestial Sphere'
As part of their mythology lesson, the students examined ancient cultures' beliefs about gods residing in different regions of the celestial sphere.
The science fiction novel featured a storyline where characters discovered a hidden civilization beyond the boundaries of the celestial sphere.
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