Answer: Kepler Space Telescope
Notes: Super Puff Planets, known for their remarkably low densities, were first identified by the Kepler Space Telescope, a NASA mission. These exoplanets have densities as low as 0.1 grams per cubic centimeter, akin to cotton candy. Notable examples include Kepler 51b, 51c, and 51d, which are relatively young, around 500 million years old, and exhibit cloudiness influenced by their temperatures.
