Meet GJ 3998 d, a captivating exoplanet orbiting the modest red dwarf star GJ 3998. Discovered in 2025 through the clever radial velocity technique by a team using multiple instruments across several observatories on Earth, this world showcases the power of ground-based astronomy. While it doesn’t have a fancy proper name yet, GJ 3998 d invites curiosity with its mystery and potential. Nestled around a cool, faint star, this planet offers a glimpse into the diversity of planetary systems out there. Its discovery highlights how astronomers piece together clues from subtle stellar wobbles to unveil new worlds—proving the universe is full of surprises waiting just beyond our cosmic neighborhood.
