A small star is eating a brown dwarf so slowly that the meal could last billions of years, and the two orbit each other every 87 minutes inside a space that wou

A small red star is pulling gas from a brown dwarf as the pair circles every 87 minutes, packed into an orbit that could fit inside the Sun. Material strikes the star’s surface and lights up a hot spot, marking a meal that could continue for billions of years. The system, ZTF J0440+2325, lies a few hundred light-years away. Aaron Householder and colleagues at MIT and other institutions described it in a study published in Nature Astronomy on October 5, 2026 ( earlier version free on arXiv ). Theory had long allowed a brown dwarf to feed a normal, hydrogen-burning star steadily, without being swallowed, but no one had seen it happen until now. A strange triangle The first clue was a shape on a graph. In observations from the Zwicky Transient Facility, which tracks changes in the sky from California’s Palomar Observatory, the system’s brightness kept tracing a triangle.