NASA researchers have identified a so-called super-Earth, catalogued as TOI-1846 b, that appears to emit a repeating signal toward Earth. The planet orbits a relatively small, cool red dwarf star roughly 154 light-years away. Initial measurements indicate the world is almost twice the size of Earth and about four times as massive. It circles its star every four days, placing it far closer to its parent star than Mercury is to the Sun. Scientists are analyzing the origin of the signal, which was detected during follow-up observations after the planet’s discovery. While its nature remains uncertain, the emissions raise new questions about the planet’s atmospheric or magnetic properties and will guide further observations with ground- and space-based telescopes.