Celestial Sphere, Horizontal vs. Equatorial coordinate system, Alt-Az vs RA-Dec, Ecliptic & Seasons

In this video we learn about Constellations and Zodiacs, Celestial Sphere, Horizontal vs. Equatorial coordinate system,  Alt-Az coordinates  vs RA-Dec coordinates,  how Meridians  are defined, what the Ecliptic is, the  apparent motion of the Sun in the sky seen from the Earth & what causes different seasons on the Earth.


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