«What is a Brown Dwarf?» brown dwarf brown dwarf stars brown dwarf stars brown dwarf brown dwarf stars brown dwarf stars brown dwarf stars brown dwarf brown dwarf Planets shine by reflected light brown dwarf stars N.A.S.A. 褐色矮星 brown dwarf brown dwarf brown dwarf stars brown dwarf Planets shine by reflected light niet energetisch genoeg brown dwarf brown dwarf brown dwarf Brauner Zwerg brown dwarfs brown dwarf star brown dwarf brown dwarf Brauner Zwerg brown dwarf brown dwarf 棕矮星 brown dwarf Brown dwarf brown dwarf stars