• Question: Have you found another solar system yet?

    Asked by anon-226223 to joannabarstow on 21 Nov 2019.
    • Photo: Joanna Barstow

      Joanna Barstow answered on 21 Nov 2019:

      Yes, lots! We know of more than 4,000 extrasolar planets now, some of which are in multi-planet systems. One of the most exciting is the TRAPPIST-1 system, which has 7 Earth-sized planets.

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