Why does a solar eclipse move from west to east?


Why do eclipse tracks move eastward even though the Earth rotates from west to east?



Because the Moon moves to the east in its orbit at about 3,400 km/hour.  Earth rotates to the east at 1,670 km/hr at the equator, so the lunar shadow moves to the east at 3,400 – 1,670 = 1,730 km/hr near the equator. You cannot keep up with the shadow of the eclipse unless you traveled at Mach 1.5.


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