Brown dwarfs are celestial objects that are often described as "failed stars" or "star-like planets." They are too small to sustain the fusion reactions that power stars, but are larger and more massive than planets. Brown dwarfs are characterized by their low luminosity, cool temperatures, and lack of hydrogen fusion in their cores. These objects can be difficult to classify, as they share characteristics with both stars and planets. They can be found either alone in interstellar space or as companions to other stars. Brown dwarfs are important for understanding the boundary between stars and planets, as well as for studying the formation and evolution of stellar systems. Research on brown dwarfs includes studying their atmospheres, compositions, temperatures, and magnetic fields. Scientists are also interested in discovering new brown dwarfs and studying their interactions with other objects in space. Overall, brown dwarfs offer a unique and fascinating window into the diversity of celestial objects in the universe.