HD 191939 d is a fascinating exoplanet orbiting the star HD 191939, discovered in 2020 thanks to the sharp eyes of NASA’s Transiting Exoplanet Survey Satellite (TESS). This space-based explorer spotted the planet as it gracefully passed in front of its sun, causing a tiny dip in starlight that revealed its presence. While the exact size and distance remain a bit mysterious, HD 191939 d joins a family of intriguing worlds around this star, offering a glimpse into the incredible variety of planets beyond our solar system. Whether it’s a rocky world or a mini-gas giant, this planet reminds us how much there is to discover in our cosmic neighborhood!
