Kepler-1540 b

Kepler-1540 b is a super-Earth about 2.5 times wider and nearly 7 times heavier than our planet, orbiting a cool red dwarf star 799 light-years away. Its equilibrium temperature of 266 Kelvin—roughly minus 7 degrees Celsius—places it in the potentially habitable zone where liquid water could exist on the surface, though considerably colder than Earth's balmy climate. The planet's circular orbit every 125 days keeps conditions stable, and its density of 2.41 grams per cubic centimeter suggests a rocky composition with a substantial atmosphere, which would help retain heat. However, at this distance from its modest host star, the planet likely receives little more stellar warmth than Earth does from the Sun, raising questions about whether any retained atmosphere would be thick enough to support a habitable surface. The high habitability score of 80 reflects these promising indicators, yet we cannot determine from current data whether the planet actually retains an atmosphere or if its surface is frozen and dormant. This world's status as a transiting super-Earth discovered a decade ago makes it a prime candidate for future atmospheric characterization with next-generation telescopes.