Which one of the following methods is used to measure distance of a planet or a star from the earth?

Echo method

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Parallax method

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Triangulation method

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None of these

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Solution

The correct option is B Parallax method
Astronomers estimate the distance of nearby objects in space by using a method called stellar parallax, or trigonometric parallax. Simply put, they measure a star's apparent movement against the background of more distant stars as Earth revolves around the sun

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Q. Assertion :Parallax method is used for measuring distances of nearby stars only. Reason: With increase of distance of star, parallactic angle becomes too small to be measured accurately.

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Which one of the following methods is used to measure distance of a planet or a star from the earth?

The correct option is B Parallax methodAstronomers estimate the distance of nearby objects in space by using a method called stellar parallax, or trigonometric parallax. Simply put, they measure a star's apparent movement against the background of more distant stars as Earth revolves around the sun