About this world
KMT-2025-BLG-0975L b is a Neptune-like planet orbiting KMT-2025-BLG-0975L, a cool red dwarf (type M) 25.8 thousand light-years from Earth. It is about 6 times the size of Earth (its size estimated from its mass) and holds 30 Earth masses.
At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2026 by microlensing with KMTNet. A foreground star's gravity magnifies a background star; a planet adds a blip.