About this world
TOI-5716 b is an Earth-sized planet orbiting TOI-5716, a cool red dwarf 129 light-years from Earth. It is about 0.96 times the size of Earth. It completes an orbit every 6.77 days at 0.04 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 400 K (127 °C): too cold for liquid water on its surface. By the "cosmic shoreline", its star has probably stripped its atmosphere away, leaving bare rock.
It was discovered in 2025 by transit with Transiting Exoplanet Survey Satellite (TESS). A planet crosses its star and dims it by a tiny, periodic fraction.