Question

What is the transit of a planet by a star?

Transit in astronomy, the passage of relatively,small body
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across the disk of a larger body, usually a star or a planet, occ
What do scientists use it for?

Answer 1

Transit, in astronomy, the passage of a relatively small body across the disk of a larger body, usually a star or a planet, occulting only a very small area. Mercury and Venus periodically transit the Sun, and a moon may transit its planet.

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