They are discovered when they dim a star they pass by ' is true statement about exoplanets among all .
So , B is correct option .
In our solar system, every planet revolves around the Sun. Exoplanets are planets that revolve around other stars . Exoplanets are extremely difficult to directly observe using telescopes. The intense light from the stars they orbit obscures them .
Therefore, astronomers employ various techniques to find and research these far-off planets. By observing the impacts that these planets have on the stars they circle, astronomers look for exoplanets.
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