Even faint debris disks can contaminate MIRI exoplanet spectra. WASP-39b is a gas giant exoplanet orbiting a G-type star, located about 700 light-years away in the constellation Virgo. It has a mass of approximately 0.28 times that of Jupiter and a radius 1.27 times that of Jupiter. The planet orbits its star every 4.1 days…