(Description) Figure 9 Artist’s impression of Kepler-11 c and its five fellow planets in orbit around their host star. Five of the six planets so far discovered in the Kepler-11 system orbit well within Mercury’s distance from the Sun. Sometimes more than one planet transits at a time.

Week 5: How to measure your exoplanet

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Artist’s impression of Kepler-11 c and its fellow planets in orbit around their host star.