NASA's discovery-era material stated that the planets pass their closest approach to each other roughly every 97 days. ^[1] The exoplanet system Kepler-36 contains two planets, Kepler-36b and Kepler-36c, orbiting a star in the Cygnus constellation. ^[2] The planetary nebula NGC 6826, also known as Caldwell 15, is located in the constellation Cygnus and is approximately 2,200 light-years from Earth. ^[3] At closest approach, the distance between Kepler-36b and Kepler-36c contracts to roughly 1.9 million kilometers. ^[4] NASA stated that from the surface of Kepler-36b, the planet Kepler-36c would appear approximately 2.5 times the apparent diameter of Earth's full Moon. ^[5] NGC 6826 is classified as a planetary nebula, which consists of gas layers released by a star entering the final stage of its life, though the term does not imply a connection to planets. ^[6] The nebula appears to blink because staring directly at the bright central star causes the fainter surrounding gas structure to disappear from view. ^[7] Using the averted vision technique, where an observer shifts their gaze slightly to the side of the object, allows the human eye to detect the fainter nebula structure again. ^[8]