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Science | Space | Stars Channel

Stars are celestial bodies made up of hot gases. Stars radiate energy that comes form thermonuclear reactions. In this section you will learn all about stars and their importance in the universe.

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How do astronomers detect that a star has a planet orbiting it?

According to an article I read, astronomers are able to detect that star has a planet orbiting it by observing the "wobble" of the star induced by the gravitational pull of one or more planets. At the tremendous distances involved, what is the technology that enables these discoveries?