This artist’s concept depicts K2-18 b, a giant planet orbiting a faint red star (lower left). Some astronomers suggest the planet shows hints of microscopic life in its atmosphere, although others are skeptical of the claim. The image includes a possible moon (small crescent to the left of the planet) for the giant planet. [NASA/CSA/ESA/J. Olmstead (STScI), N. Madhusudhan (Cambridge University)]
Find out more in our radio program entitled Confusing Planet.