The effects of two planets with fairly circular orbits can combine to have the same effect on a star as one planet with a very elongated orbit, new research suggests (Illustration: ESA)
The effects of two planets with fairly circular orbits can combine to have the same effect on a star as one planet with a very elongated orbit, new research suggests (Illustration: ESA)
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I would think they would have to orbit pretty close to each other to produce the effect. Otherwise the inner planet would be outrunning the outer planet.
