• Question: what is the biggest planet discovered including out of our solar system

    Asked by thinpuppy79 to Stephen, Sammie on 9 Mar 2018.
    • Photo: Sammie Buzzard

      Sammie Buzzard answered on 9 Mar 2018:


      We measure the size of exoplanets (planets outside of our solar system that orbit a star) in units of ‘Jupiter radii’- a distance equal to the radius of Jupiter. The largest exoplanet is currently HD 100546 b (catchy, right?) which is about 6.9 Jupiter radii, but we’re discovering new ones all the time.

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