This artist idea exhibits K2-138, the primary multi-planet system found by citizen scientists. The central star is barely smaller and cooler than our Solar. The 5 identified planets are all between the scale of Earth and Neptune. Planet b could doubtlessly be rocky, however planets c, d, e, and f seemingly include massive quantities of ice and gasoline. All 5 planets have orbital intervals shorter than 13 days and are all extremely scorching, starting from 800 to 1,800 levels Fahrenheit.
Picture Credit score: NASA/JPL-Caltech
Clarification from: https://photojournal.jpl.nasa.gov/catalog/PIA22088
