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Which would be used to measure the distance between the earth and a planet ,meter ruler or a measuring tape? Why?

User Fersca
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Answer:

parallax

Due to foreshortening, nearby objects show a larger parallax than farther objects when observed from different positions, so parallax can be used to determine distances. To measure large distances, such as the distance of a planet or a star from Earth, astronomers use the principle of parallax.

User Haardik Dharma
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