Retrograde motion for Mars, illustration. Because the Earth (blue) moves faster in its orbit than Mars (red) does around the Sun (yellow), Mars appears at times to move backwards across the sky relative to the background of stars (top) when viewed from Earth. This apparent backwards movement is known as retrograde motion.

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Creative#:

TOP25357998

Source:

達志影像

Authorization Type:

RM

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須由TPG 完整授權

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N/A

Property Release:

N/A

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No

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